Edge server high availability and next hop to FE servers

Hi All,
As per the article https://technet.microsoft.com/en-us/library/gg412847.aspx "Each Edge Server is a multihomed computer
with external and internal facing interfaces. The adapter Domain Name System (DNS) settings depend on whether there are DNS servers in the perimeter network. If
no DNS servers exist in the perimeter, the Edge Server(s) use external DNS servers to resolve Internet name lookups, and each Edge Server uses a HOST to resolve the next hop server names to IP addresses."
If i have 3 FE servers with DNS load balancing, where the pool.contoso.com would be associated with 192.168.0.1,
192.168.0.2, 192.168.0.3.
How do i create Host record for front end pool in the edge server? i mean which among the 3 ips should i use? as i can use only one IP in the host file record for a host name.
If i create pool.contoso.com
192.168.0.1 and that server is unavailable then the whole purpose of Edge and FE HA is defeated !!

The same doc says: "Edit the HOST file on each Edge Server to contain a record for the next hop server or virtual IP (VIP) (the record will be the Director, Standard Edition server, or a Front End pool that was configured as the Edge Server next hop
address in Topology Builder). If you are using DNS load balancing, include a line for each member of the next hop pool."
But you're right, it was my understanding that only the first line of the hosts file was used. I'd have to presume the application is somewhat intelligent about this or it's incorrect guidance. I've never tested it.
You could use internal DNS too, resolving the issue, but if your DMZ was ever penetrated, someone could potentially use DNS to help map out your network. Otherwise, you'd want to add a DNS server in your DMZ or use HLB just for this which I wouldn't
be in love with.
Please remember, if you see a post that helped you please click "Vote As Helpful" and if it answered your question please click "Mark As Answer".
SWC Unified Communications
This forum post is based upon my personal experience and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

Similar Messages

Exchange Server 2013: Deploying High Availability and Site Resilience

Dear All,
I'm planning to Deploying High Availability and Site Resilience.
I have two data center and I have one exchange server on each site (multi-role).
I want to deploy Database Availability Group.
Is it possible? any idea?
in addition, all clients is connected to their email to their own site. dose it has any affected to Outlook users?
KH
[email protected]

Hi MAS,
Currently, I have only mailbox server and only database for each site.
+ Site1: I has DB1 and all users in site1 will access to their own site. (MBX1) subnet 192.168.1.0/24
+ Site2: I has DB2 and all users in site2 will access to their own site. (MBX2) subnet 192.168.2.0/24
But the email for incoming and outgoing with external will go to Site1.
In Planning,
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BR,
KH
[email protected]

SQL Server 2005 High Availability and Disaster Recovery options

Hi, We are are working on a High Availability & Disaster Recovery Planning solution for an application database which is on SQL Server 2005. What different options have we got to implement this for SQL Server 2005 and after we have everything setup how
do we test the failover is working?
Thanks in advance.........
Ione

DR : Disaster recovery is the best option for the business to minimize their data loss and downtime. The SQL server has a number of native options. But, everything is depends upon your recovery time objective RTO and recovery point objective RPO.
1. Data center disaster
Geo Clustering
2. Server(Host)/Drive (Except shared drive) disaster
Clustering
3. Database/Drive disaster
Database mirroring
Log shipping
Replication
Log shipping
Log shipping is the process of automating the full database backup and transaction log on a production server and then automatically restores them on to the secondary (standby) server.
Log shipping will work either Full or Bulk logged recovery model.
You can also configure log shipping in the single SQL instance.
The Stand by database can be either restoring or read only (standby).
The manual fail over is required to bring the database online.
Some data can be lost (15 minutes).
Peer-to-Peer Transactional Replication
Peer-to-peer transactional replication is designed for applications that might read or might modify the data in any database that participates in replication. Additionally, if any servers that host the databases are unavailable, you can modify the application
to route traffic to the remaining servers. The remaining servers contain same copies of the data.
Clustering
Clustering is a combination of one or more servers it will automatically allow one physical server to take over the tasks of another physical server that has failed. Its not a real disaster recovery solution because if the shared drive unavailable we cannot
bring the database to online.
Clustering is best option it provides a minimum downtime (like 5 minutes) and data loss in case any data center (Geo) or server failure.
Clustering needs extra hardware/server and it’s more expensive.
Database mirroring
Database mirroring introduced in 2005 onwards. Database Mirroring maintain an exact copy of a database on a different server. It has automatic fail over option and mainly helps to increase the database availability too.
Database mirroring only works FULL recovery model.
This needs two instances.
Mirror database always in restoring state.
http://msdn.microsoft.com/en-us/library/ms151196%28v=sql.90%29.aspx
http://blogs.technet.com/b/wbaer/archive/2008/04/19/high-availability-and-disaster-recovery-with-microsoft-sql-server-2005-database-mirroring-and-microsoft-sql-server-2005-log-shipping-for-microsoft-sharepoint-products-and-technologies.aspx
http://www.slideshare.net/rajib_kundu/disaster-recovery-in-sql-server
HADR Considerations
Need to Understand the business motivations and regulatory requirements that are driving the customer's HA/DR requirements. Understand how your customer categorizes the workload from an HA/DR perspective. There is likely to be an alignment between the needs
and categorization.
Check for both the recovery time objective (RTO) and the recovery point objective (RPO) for different workload categories, for both a failure within a data center (local high availability) and a total data center failure (disaster recovery). While RPO and
RTO vary for different workloads because of business, cost, or technological considerations, customers may prefer a single technical solution for ease in operations. However, a single technical solution may require trade-offs that need to be discussed with
customers so that their expectations are set appropriately.
Check and understand if there is an organizational preference for a particular HA/DR technology. Customers may have a preference because of previous experiences, established operational procedures, or simply the desire for uniformity across databases from
different vendors. Understand the motives behind a preference: A customers' preference for HA/DR may not be because of the functions and features of the HA/DR technology. For example, a customer may decide to adopt a third-party solution for DR to maintain
a single operational procedure. For this reason, using HA/DR technology provided by a SAN vendor (such as EMC SRDF) is a popular approach.
To design and adopt an HA/DR solution it is also important to understand the implications of applying maintenance to both hardware and software (including Windows security patching). Database mirroring is often adopted to minimize the service disruption
to achieve this objective.
HADR Options :
Failover clustering for HA and database mirroring for DR.
Synchronous database mirroring for HA/DR and log shipping for additional DR.
Geo-cluster for HA/DR and log shipping for additional DR.
Failover clustering for HA and storage area network (SAN)-based replication for DR.
Peer-to-peer replication for HA and DR (and reporting).
Backup & Restore ( DR)
keep your server DB backups in network location ( DR)
Always keep your sql server 2005 upto date, in case if you are not getting any official support from MS then you have to take care of any critical issues and more..
Raju Rasagounder Sr MSSQL DBA

How to configure high availability and disaster recovery? And user authenticate

We are in the process of rolling out our online help which was created using Robohelp. In our initial rollout we will provide access to the files via our Client Portal which requires authentication. We are also planning for our next version where we intend to implement Robohelp server functionality.
Our IT team is looking at options on how to configure for High Availability and Disaster Recovery. It seems that Robohelp doesn't have any built-in functionality in this area. In addition we require that our users authenticate. The options for the server version seem to be more internally focused and we would need to solution the authentication using a third party.
Would anyone be willing to share their approach in these areas? Would you be willing to participate in a conference call with our IT Professionals?

Hello again
I see my good friend Peter replied to your LInkedIn post where you cross-posted the same question. For those here that have no clue what Peter stated, here it is:
What are you seeking to recover? Your projects? Your outputs? This sounds like a question more appropriate to Disaster Recovery consultants and far wider reaching than RoboHelp. To me it seems like a question your IT people should be asking direct to such consultants who would expect a fee for their advice.
I would agree with Peter's reply.
I'll also go further and ask what exactly is being done in this realm for the application? Help files generally are there to support an application on the server. So whatever you are doing for the applciation should also be able to be used for the WebHelp, FlashHelp or web based AIR Help files, no?
Cheers... Rick
Helpful and Handy Links
RoboHelp Wish Form/Bug Reporting Form
Begin learning RoboHelp HTML 7, 8 or 9 within the day!
Adobe Certified RoboHelp HTML Training
SorcerStone Blog
RoboHelp eBooks

The crawler could not communicate with the server. Check that the server is available and that the firewall access is configured correctly. If the repository was temporarily unavailable, an incremental crawl will fix this error

We are getting the below error when we see in Crawl logs
"The crawler could not communicate with the server. Check that the server is available and that the firewall access is configured correctly. If the repository was temporarily unavailable, an incremental crawl will fix this error."
This is happening in FAST search.
Here I can see soke of the logs related to this search crawl.
Could anyone please help on this?
web application 'http://xvy/' doesn't use search application 'FAST Query SSA', skipping it.
ABC\sp_search' on web application 'http://xvy/'. 2d7dba01-3d2e-4903-b59f-9a8601627bcd
07/30/2014 01:30:46.65 OWSTIMER.EXE (0x28DC)                   0x1BC0 SharePoint Server Search      Administration
dl2m Verbose Search application 'Search Service Application 1': Skipping web application '48ed7882-9f70-424e-bf72-e3c9f5340b97' because its outbound url 'http://ebc:30347' was automatically added once.
Ensure full read access to the indexing account 'ABC\sp_search' on web application 'http://nvcp/'. 85041609-d618-4132-ac8e-195a910d99a0
07/30/2014 01:31:46.53 OWSTIMER.EXE (0x28DC)                   0x05F4 SharePoint Server Search      Administration
dl2m Verbose Search application 'FAST Query SSA': Skipping web application '57718ea1-8cb5-4adc-abd2-9e55415e5791' because its outbound url 'http://nvcp' was automatically added once. 85041609-d618-4132-ac8e-195a910d99a0
07/30/2014 01:31:46.53 OWSTIMER.EXE (0x28DC)                   0x05F4 SharePoint Server Search      Administration
dl2n Verbose Search application 'FAST Query SSA': Adding start address 'http://nvcp' for web application '57718ea1-8cb5-4adc-abd2-9e55415e5791' to list of valid start addresses. 85041609-d618-4132-ac8e-195a910d99a0
07/30/2014 01:31:46.53 OWSTIMER.EXE (0x28DC)                   0x05F4 SharePoint Server Search      Administration
dmb6 Verbose Ensure full read access to the indexing account 'ABc\sp_search' on web application 'http://nvcp'ext/'. 85041609-d618-4132-ac8e-195a910d99a0
07/30/2014 01:31:46.53 OWSTIMER.EXE (0x28DC)                   0x05F4 SharePoint Server Search      Administration
dl2m Verbose Search application 'FAST Query SSA': Skipping web application '64d562a1-535e-4917-8979-88840e2a67fe' because its outbound url 'http://nvcp'ext' was automatically added once. 85041609-d618-4132-ac8e-195a910d99a0
07/30/2014 01:31:46.53 OWSTIMER.EXE (0x28DC)                   0x05F4 SharePoint Server Search      Administration
dl2n Verbose Search application 'FAST Query SSA': Adding start address 'http://nvcpext' for web application '64d562a1-535e-4917-8979-88840e2a67fe' to list of valid start addresses. 85041609-d618-4132-ac8e-195a910d99a0
07/30/2014 01:31:46.53 OWSTIMER.EXE (0x28DC)                   0x05F4 SharePoint Server Search      Administration
dmb6 Verbose Ensure full read access to the indexing account 'ABC\sp_search' on web application 'http://nvcpnew/'. 85041609-d618-4132-ac8e-195a910d99a0
executing SQL query {? = call dbo.proc_MSS_PropagationIndexerGetReadyQueryComponents} [propdatabase.cxx:70] d:\office\source\search\native\ytrip\tripoli\propagation\propdatabase.cxx
07/30/2014 01:32:04.31 mssearch.exe (0x0588)                   0x1DE4 SharePoint Server Search      Propagation Manager
e3o3 Verbose executing SQL query {? = call dbo.proc_MSS_PropagationIndexerGetReadyQueryComponents} [propdatabase.cxx:70] d:\office\source\search\native\ytrip\tripoli\propagation\propdatabase.cxx
07/30/2014 01:32:04.68 mssdmn.exe (0x15CC)                     0x1060 SharePoint Server Search      HTTP Protocol
Handler         du4i                    0x29E4 SharePoint Server Search      HTTP
Protocol Handler         du4i Verbose CHttpAccessorHelper::InitRequestInternal - opening request for '/robots.txt'.   [httpacchelper.cxx:353] d:\office\source\search\native\gather\protocols\http\httpacchelper.cxx
07/30/2014 01:32:04.70 mssdmn.exe (0x15CC)                     0x29E4 SharePoint Server Search      HTTP Protocol
Handler         du54 High    CHttpAccessorHelper::InitRequestInternal - unexpected status (503) on request for 'http://ppecpnew/robots.txt' Authentication 0. [httpacchelper.cxx:703]
d:\office\source\search\native\gather\protocols\http\httpacchelper.cxx
07/30/2014 01:32:04.70 mssearch.exe (0x0588)                   0x130C SharePoint Server Search      Gatherer
cd11 Warning The start address http://nvcp'/sites/quipme cannot be crawled. Context: Application 'FAST_Content_SSA', Catalog 'Portal_Content' Details:
The crawler could not communicate with the server. Check that the server is available and that the firewall access is configured correctly. If the repository was temporarily unavailable, an incremental crawl will fix this error.   (0x80041200)
07/30/2014 01:32:04.70 mssdmn.exe (0x15CC)                     0x104C SharePoint Server Search      HTTP Protocol
Handler         du4i Verbose CHttpAccessorHelper::InitRequestInternal - opening request for '/robots.txt'.   [httpacchelper.cxx:353] d:\office\source\search\native\gather\protocols\http\httpacchelper.cxx
07/30/2014 01:32:04.70 mssdmn.exe (0x15CC)                     0x104C SharePoint Server Search      HTTP Protocol
Handler         du54 High
07/30/2014 01:32:04.70 mssearch.exe (0x0588)                   0x2948 SharePoint Server Search      Gatherer
cd11 Warning The start address
http://nvcp'/sites/MDPPubng cannot be crawled. Context: Application 'FAST_Content_SSA', Catalog 'Portal_Content' Details: The crawler could not communicate with the server. Check that the server is
available and that the firewall access is configured correctly. If the repository was temporarily unavailable, an incremental crawl will fix this error.   (0x80041200)
CHttpProbeHelper::ProbeServer: InitRequest failed for 'http://ppecpnew/_vti_bin/sitedata.asmx'. Return error to caller, hr=80041200 [stscommon.cxx:490] d:\office\source\search\native\gather\protocols\common\stscommon.cxx
07/30/2014 01:32:26.06 mssdmn.exe (0x15CC)                     0x193C SharePoint Server Search      PHSts
dvg0 High    STS3::COWSServer::InitializeClaimsCookie: Probing url 'http://pncvr' failed. Return error to caller, hr=80041200 [sts3util.cxx:1332] d:\office\source\search\native\gather\protocols\sts3\sts3util.cxx
07/30/2014 01:32:26.06 mssdmn.exe (0x15CC)                     0x193C SharePoint Server Search      PHSts
en0e High    CSTS3Accessor::InitURLType: Return error to caller, hr=80041200                 [sts3acc.cxx:2214] d:\office\source\search\native\gather\protocols\sts3\sts3acc.cxx
07/30/2014 01:32:26.06 mssdmn.exe (0x15CC)                     0x193C SharePoint Server Search      PHSts
dv3p High    CSTS3Accessor::GetServer fails, Url sts4://pnvpr/siteurl=sites/product/siteid={7ebfb072-08a8-4df7-8f74-e06730325d9a}/weburl=/webid={bd7ae724-1256-4b26-9633-416447d6bc5c}, hr=80041200 [sts3acc.cxx:185]
d:\office\source\search\native\gather\protocols\sts3\sts3acc.cxx
07/30/2014 01:32:26.06 mssdmn.exe (0x15CC)                     0x193C SharePoint Server Search      PHSts
dvb1 High    CSTS3Accessor::Init fails, Url sts4:/mngbv/siteurl=sites/product/siteid={7ebfb072-08a8-4df7-8f74-e06730325d9a}/weburl=/webid={bd7ae724-1256-4b26-9633-416447d6bc5c}, hr=80041200 [sts3handler.cxx:312]
d:\office\source\search\native\gather\protocols\sts3\sts3handler.cxx
07/30/2014 01:32:26.06 mssdmn.exe (0x15CC)                     0x16FC SharePoint Server Search      HTTP Protocol
Handler         du2z Verbose CHttpProbeHelper::ProbeServer: Probing server with url 'http://pnvpr/_vti_bin/sitedata.asmx'. [stscommon.cxx:476] d:\office\source\search\native\gather\protocols\common\stscommon.cxx
07/30/2014 01:32:26.08 mssdmn.exe (0x15CC)                     0x193C SharePoint Server Search      PHSts
dvb2 High    CSTS3Handler::CreateAccessorExD: Return error to caller, hr=80041200            [sts3handler.cxx:330] d:\office\source\search\native\gather\protocols\sts3\sts3handler.cxx
07/30/2014 01:32:26.08 mssdmn.exe (0x15CC)                     0x16FC SharePoint Server Search      HTTP Protocol
Handler         du4i Verbose CHttpAccessorHelper::InitRequestInternal - opening request for '/_vti_bin/sitedata.asmx'. [httpacchelper.cxx:353] d:\office\source\search\native\gather\protocols\http\httpacchelper.cxx
earch application 'FAST Query SSA': Adding start address 'http://mnvfgext' for web application '64d562a1-535e-4917-8979-88840e2a67fe' to list of valid start addresses. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
07/30/2014 01:32:46.53 OWSTIMER.EXE (0x28DC)                   0x1444 SharePoint Server Search      Administration
dmb6 Verbose Ensure full read access to the indexing account 'ABC\sp_search' on web application 'http://nvpr/'. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
07/30/2014 01:32:46.53 OWSTIMER.EXE (0x28DC)                   0x1444 SharePoint Server Search      Administration
dl2m Verbose Search application 'FAST Query SSA': Skipping web application 'cea7b67b-fd5f-4c9a-a300-64a7d7ca3093' because its outbound url 'http://pnvpr' was automatically added once. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
07/30/2014 01:32:46.53 OWSTIMER.EXE (0x28DC)                   0x1444 SharePoint Server Search      Administration
dl2n Verbose Search application 'FAST Query SSA': Adding start address 'http://pnvpr' for web application 'cea7b67b-fd5f-4c9a-a300-64a7d7ca3093' to list of valid start addresses. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
07/30/2014 01:32:46.53 OWSTIMER.EXE (0x28DC)                   0x1444 SharePoint Server Search      Administration
dl2k Verbose web application 'http://abcrsp/' doesn't use search application 'FAST Query SSA', skipping it. a6b7948a-dc16-419d-b58a-0ee798a0bb9c
07/30/2014 01:32:46.53 OWSTIMER.EXE (0x28DC)                   0x1444 SharePoint Server Search      Administration
dl2k Verbose web application 'http://excb/' doesn't use search application 'FAST Query SSA', ski
Anil Loka

Hi,
According to your post, my understanding is that you got error when communicating to the server.
This happens when crawler is not able to connect to the server. Make sure server name is correct. Couple of steps to troubleshoot it
You should be able to ping the server from the server having crawl component. Make sure there is an entry for the server in the host file under c:\Windows\System32\drivers\etc folder.
          Ping <servername>
      2. You should be able to connect to the server using telnet command
Telnet< servername> <port number>
More information:
Troubleshooting of FAST Search Configuration
If the issue still exists, you can delete the old search application and recreate from the beginning.
You can also reset the index and do a full crawl after.
Here is a similar thread for your reference:
http://social.technet.microsoft.com/Forums/en-US/f3c61b53-304a-4c2a-a370-d0e573219d1d/an-unrecognized-http-response-was-received-when-attempting-to-crawl-this-item?forum=sharepointadminprevious
Best Regards,
Linda Li
Linda Li
TechNet Community Support

HTTP Server High Availability

Hello All.
I have a question regarding OC4J and HTTP server High Availability.
I want to do something like the Figure 3-1 of the Oracle Application Server High Availability Guide 10.1.2. See this link
http://download-east.oracle.com/docs/cd/B14099_11/core.1012/b14003/midtierdesc.htm#CIHCEDFC
What I have now is the following:
Three hosts
Two of them are an OAS 10.1.2 which we already configured the Cluster and deployed our applications (used this tutorial: http://www.oracle.com/technology/obe/obe_as_1012/j2ee/deploy/j2eecluster/farmcluster.htm)
Let's say this nodes are:
- host1
- host2
The other one is the Oracle WebCache stand alone (will act as Load Balancer). We will call this
- hostwc3
We already configured the WebCache as Load Balancer and is working just fine. We also configured the session replication successful and work great with our applications.
What we have not clear is the following:
When a client try to visit http://hostwc3/application/ the LOAD BALANCER routes him to, let's say http://host1/application/ and in the browser's URL will not show the Virtual Server anymore (the webcache server) and will show the actual real Apache address (host1 )that is attending him. IF we "kill" on ENTIRE host1 (apache, oc4j, etc..) the clients WILL perceive the down and if they try to press F5, the will try to access to an Apache that doesn't is up and running.... The behavior expected is that the browser NEVER shows the actual Apache URL, so, when some apache goes down, the client do not disconnect (as it happens with and OC4J downfall ) and always works with the "virtual web server".
I came up with some ideas but I want you Guys to give me an advice:
- In Web Cache, do not route for load balancing to Apache, and route the Oc4J directly (Is this possible?)
- Configure a HTTP Server Cluster, this means that we have to have a "Virtual Name"to the Apaches (two of them). Is this possible? how?
- Use the rewrite mode of the Apache. Is this a good idea?
- Any other idea how to fix the Apache "Single Point Of Failure" ?
According with the figure 3-1 ( Link above ) we do can have HTTP Server in a cluster. But I have no idea how to manage it or configure it.
Thanks in advance any help!

You cannot point Outlook Anywhere to your DAG cluster IP address. It must be pointed to the actual IP address of either server.
For no extra cost DNS round robin is the best you will get, but it does have some drawbacks as it may give the IP address of a server you have taken down for maintenance or the server has an issue.
You could look to implement a load balancer but again if you are doing this for high availability then you want more than one load balancer in the cluster - otherwise you've just moved your single point of failure.
Having your existing NAT and just remembering to update it to point to the other server during maintenance may suit your needs for now.
If you can go into more detail about what the high availability your business is looking to achieve and the budget we can suggest the best method to meet those needs for the price point.
Have a great day
Oliver
Oliver Moazzezi | Exchange MVP, MCSA:M, MCITP:Exchange 2010,Exchange 2013, BA (Hons) Anim | http://www.exchange2010.com | http://www.cobweb.com | http://twitter.com/OliverMoazzezi

– Enable high availability and redundancy for Cisco WAAS

How this is available
– Enable high availability and redundancy for Cisco WAAS appliances in data centers.
Thank you.

Hi,
You can serially cluster two WAE devices with the Cisco WAE Inline Network Adapter installed to provide higher availability in the data center if a device fails. If the current optimizing device fails, the inline group shuts down, or the device becomes the overloaded, the second WAE device in the cluster provides the optimization services. Deploying WAE devices in a serial inline cluster for scaling or load balancing is not supported.
More deatils here: Clustering Inline WAEs
Hope this helps.
Regards.
PS: Please mark this as Answered, if this answers your question.

Difference btw: Distributed, High-Availability and Additional SAP System Instances

Hello,
In the installation Doc for NW 741, there is 3 other installations scenarios beside the single instance, can you pl. highlight the difference?
Cheers,
F

Hello Fouad,
Distributed landscape:
In distributed landscape, every instance can run on a separate host
- Central services instance for ABAP ( ASCS)
- Enqueue replication server instance (ERS instance ) for ASCS instance
- Database instance
- Primary application server instance (PAS)
High availability :
In high availability ,all above instances can run on seperate host. Here you can run all instance in switchover cluster infrastructure. That means ,for any instance if one node in cluster fails ,it switch over to other other node and still operations can run without any distrubance.
Additional SAP instance:
Additional SAP aaplication instance can be installed to scale the performance of an SAP system. It can be installed on one of the above instance host or on differnt host.
The term "additional application server instance "was introduced to replace term dialog instance from SAP Netweaver 7.1 and higher.
For more and detailed information ,you can refer to Installation guide for the SAP release you are planning to install and for DB/OS combination.
Hope this helps.
Regards,
Archana

JCo Server High Availability

How can I make the JCo server implement "High Availability" functionality. The SAP Server which the makes calls to the JCo Server is HA-aware. So if there is a failover, the SAP Server switches over to the other instance but the JCo server keeps sending the message "Server unavailable". Is there a solution for this problem.
Thanks.

Single Appliance not necessarily means Single Point of Failure, an appliance with HW Redundancy could handle failure and provide High Availability, if only configured well.
Does Symantec BrightMail Appliance provide such redundancy configuration?
You will have to ask their support or in a Symantec Forum.
Twitter!: Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

Exchange server 2013 CAS server high availability

Hi
I have exchange server 2010 sp3(2 MB, 2Hub/Cas) servers.
Planning to migrate to exchange server 2013.( 2 cas servers and 2 mbx servers).
I dont want to go all traffic single so i am keeping the role separate..
In exchange 2010 i achieved hub/CAS high availability through NLB.
In exchange 2013 how to acheive this...
Please share your suggestions with document if possible...

Here ya go:
http://technet.microsoft.com/en-us/library/jj898588(v=exchg.150).aspx
Load balancing
and
http://technet.microsoft.com/en-us/office/dn756394
Even though it says 2010, it applies to 2013 vendors as well.
Twitter!: Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

Mac OS X Server High Availability

I'm getting two Xserve and a Vdeck for storage. The server will have the basic functions of file and network. I would like to implement a solution in high availability. In the microsoft world, the name is failover cluster.
The files and settings will be in storage. I need the second server performs the functions automatically if the first fails.
Can anyone help me?

There is an IP Failover feature on XServes. Check this article: http://docs.info.apple.com/article.html?path=ServerAdmin/10.5/en/c3fs29.html
It is for Leopard (10.5) Server, though I think that many things did not change.
Kostas

SAP POS - Xpress Server High availability

Dear All,
I have a requirement for Installing "High Availability" for SAP POS XPS server (Store server), Transnet server, & Transnet client.
I have gone thru the possibilities of having Backup server for XPS store server, but the backup server supported by SAP has some major restrictions listed below.
1. Store closing
2. Terminal Closing
3. EOD ( End of the day)
4. Exchange with reciept
5. Layaway sale.
Please let me know whether their is a possibility for achieving high availability for store server which performs the above listed transactions too.
Appreciate if any body can reply asap.
Best regards
Syed

Hello Syed,
Having High Availability for an Xpress is not standards SAP implementation and is quite u201Coverkillu201D. The use of the backup server is designed to allow the store to function and service itu2019s customers until a server can be rebuilt or repaired.
BTW:
-Layaways can be done in offline mode and it will post to the server when it becomes available
-Returns can be done on the backup server if the customer implemented Returns Authorization

High Availability and mac mini

Hi All,
Currently running Mac OS X Server on a mac mini, I'm looking for some ways to make that mac mini "server" a high availability system for my office.
The first thing i will change is to install the operating system on a external firewire 2 disks RAID 1 hard drive : http://www.lacie.com/us/products/product.htm?pid=10967
Then I'm thinking how to make sure the rest of the mac mini will be running all the time as well.
That's why I'm wondering if it's possible to make everything double : 2 minis with 1 RAID hard drive each.
Each complete set would be linked to create somewhat of fail-over system : If one set woes the other one can take over with exactly the same data.
A bit like what it's been done here :
http://homepage.mac.com/pauljlucas/personal/macmini/cluster.html but with OS X Server instead of Linux.

Would this be useful?
http://daugerresearch.com/pooch/top.shtml
!http://daugerresearch.com/images/pooch1.jpg!
+What is Pooch?+
+Pooch is software providing the easiest way to assemble and operate a high-performance parallel computer. We encourage you to follow the Mac Cluster Recipe and see for yourself.+

Sql Server High availability failover trigger

Hello,
We are implementing sql server 2012 availability groups (AG). Our secondary databases are not accessible in order to save licenses.
We have a lot of issues concerning monitoring, backup and SSIS. They all come down to the fact that they want basic information from the secondary, that is not accessible. We are implementing SSIS, which is supported on AG, but the SSISDB is encrypted.
Backup problem
The secondary instance does not know anything about the backups made in the primary instance. After a failover differential backups fail.
SSIS problem:
There is a blog (http://blogs.msdn.com/b/mattm/archive/2012/09/19/ssis-with-alwayson.aspx) that suggest to make a job that checks whether the status has changed from secondary to primary. If so, you can decrypt and encrypt again.
This job has to be executed every minute. Which is way too much effort for an event that happens once in a while. There are a few other problems with this solution. The phrase "use ssisdb" has to be included in the a job step. And the
jobstep fails. The secondary is not accessible.
Monitoring problems:
We use Microsoft tooling for monitoring: SCOM. Scom does not recognize a non readable secondary and tries to login continuously.
There are a few solutions that I can think of:
- sql server build in failover trigger
- Special status of secondary database.
Failover trigger:
We would like a build-in failover trigger, in stead of a time based job, that starts a few standard maintenance actions if only at the time (or directly after) a failover has occurred. Because now our HA cluster is not really high available until :
- SSISDB works and is accessible after failover
- Backup information is synchronised
- SCOM monitoring skips the secondary database (scom produces loads of login failures)
Does anyone have any suggestion how to fix this?

No built in trigger can achieve your requirement.

High Availability and load balancing

Hi,
I have 6513 catalyst with redundant sup720 and msfc. All the servers are connected to this switch and there is no vlan configuration. Here is the hardware config of the box.
Mod Slot Ports Module-Type Model Sub Stat
1 1 48 10/100/1000BaseT Ethernet WS-X6148-GE-TX no ok
2 2 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
3 3 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
4 4 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
5 5 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
6 6 48 10/100BaseTX Ethernet WS-X6148-RJ-45 no ok
7 7 2 1000BaseX Supervisor WS-SUP720-BASE yes ok
15 7 1 Multilayer Switch Feature WS-SUP720 no ok
8 8 2 1000BaseX Supervisor WS-SUP720-BASE yes
I want to introduce a new 6513 chassis with same knid of configuration. Please help me out to configure these boxes to provide the high availabilty as well as load balancing for the server farm. Do I need to do any thing on the servers in terms of hwardare / software requirment to achieve the objective.
thnaks & regards
shalabh

The config is the same for both switches:
(this will enable port channel bundle, you can specify upto 16 ports..i would recommend 10)
(config-if#)interface range gigabitethernet 1/1-2
(config-if#)Description PORT-CHANNEL Interface
(config-if#)switchport
(config-if#)channel-group 1 mode on
(config-if#)switchport trunk encapsulation dot1q
(config-if#)switchport mode trunk
(config-if#)speed 1000
(config-if#)no shutdown
(Enable SRM SSO)
router(config)#redundancy
router(config-red)#mode sso
router(config-red)#end
router#show redundancy states
you should see my state = active
peer state = standby hot
where are your users come into the 6500's? if they are sitting on the 6500's I would recommend putting them in a separate vlan.

Edge server high availability and next hop to FE servers

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