CAS ARRAY fail-over and emails stuck

Dear all,
for some reasons we are in Exchange Server Coexistance mode that is 1 Exchange 2003 Server and 2. Exchange 2010 servers.
We have CAS array(node-1 And Node-2) and DAG in place , but the problem is whenever my Node-1 is down emails are getting stuck routing group connector on legacy server and Exchange 2010 to Exchange 2010 emails are working.
oppositly
when my Node-2 is down everything works.
how do I FIX this ?
TheAtulA
I assume the CAS also have the hub trasnport installed?
Check the Routing Group Connector(s) (Get-RoutingGroupConnector) and ensure the source and destination transports include both CAS nodes, not just Node-1.
If not, then use set-routinggroupconnector to set the correct source and target servers
https://technet.microsoft.com/en-us/library/aa998581(v=exchg.141).aspx
Twitter!: Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

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OCR and voting disks on ASM, problems in case of fail-over instances

Hi everybody
in case at your site you :
- have an 11.2 fail-over cluster using Grid Infrastructure (CRS, OCR, voting disks),
where you have yourself created additional CRS resources to handle single-node db instances,
their listener, their disks and so on (which are started only on one node at a time,
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then you might have problems (as we had) because you might:
- reach max number of diskgroups handled by an ASM instance (63 only, above which you get ORA-15068);
- experiment delays (especially in case of multipath), find fake CRS resources, etc.
whenever you dismount disks from one node and mount to another;
So (if both conditions are true) you might be interested in this story,
then please keep reading on for the boring details.
One step backward (I'll try to keep it simple).
Oracle Grid Infrastructure is mainly used by RAC db instances,
which means that any db you create usually has one instance started on each node,
and all instances access read / write the same disks from each node.
So, ASM instance on each node will mount diskgroups in Shared Mode,
because the same diskgroups are mounted also by other ASM instances on the other nodes.
ASM instances have a spfile parameter CLUSTER_DATABASE=true (and this parameter implies
that every diskgroup is mounted in Shared Mode, among other things).
In this context, it is quite obvious that Oracle strongly recommends to put OCR and voting disks
inside ASM: this (usually called CRS_DATA) will become diskgroup number 1
and ASM instances will mount it before CRS starts.
Then, additional diskgroup will be added by users, for DATA, REDO, FRA etc of each RAC db,
and will be mounted later when a RAC db instance starts on the specific node.
In case of fail-over cluster, where instances are not RAC type and there is
only one instance running (on one of the nodes) at any time for each db, it is different.
All diskgroups of db instances don't need to be mounted in Shared Mode,
because they are used by one instance only at a time
(on the contrary, they should be mounted in Exclusive Mode).
Yet, if you follow Oracle advice and put OCR and voting inside ASM, then:
- at installation OUI will start ASM instance on each node with CLUSTER_DATABASE=true;
- the first diskgroup, which contains OCR and votings, will be mounted Shared Mode;
- all other diskgroups, used by each db instance, will be mounted Shared Mode, too,
even if you'll take care that they'll be mounted by one ASM instance at a time.
At our site, for our three-nodes cluster, this fact has two consequences.
One conseguence is that we hit ORA-15068 limit (max 63 diskgroups) earlier than expected:
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so 30 diskgroups each node, for a total of 90 diskgroups (30 instances) on the cluster;
- in case one node failed, surviving two should get resources of the failing node,
in the worst case: one node with 60 diskgroups (20 instances), the other one with 30 diskgroups (10 instances)
- in case two nodes failed, the only node survived should not be able to mount additional diskgroups
(because of limit of max 63 diskgroup mounted by an ASM instance), so all other would remain unmounted
and their db instances stopped (they are not Production instances);
But it didn't worked, since ASM has parameter CLUSTER_DATABASE=true, so you cannot mount 90 diskgroups,
you can mount 62 globally (once a diskgroup is mounted on one node, it is given a number between 2 and 63,
and other diskgroups mounted on other nodes cannot reuse that number).
So as a matter of fact we can mount only 21 diskgroups (about 7 instances) on each node.
The second conseguence is that, every time our CRS handmade scripts dismount diskgroups
from one node and mount it to another, there are delays in the range of seconds (especially with multipath).
Also we found inside CRS log that, whenever we mounted diskgroups (on one node only), then
behind the scenes were created on the fly additional fake resources
of type ora*.dg, maybe to accomodate the fact that on other nodes those diskgroups were left unmounted
(once again, instances are single-node here, and not RAC type).
That's all.
Did anyone go into similar problems?
We opened a SR to Oracle asking about what options do we have here, and we are disappointed by their answer.
Regards
Oscar

Hi Klaas-Jan
- best practises require that also online redolog files are in a separate diskgroup, in case of ASM logical corruption (we are a little bit paranoid): in case DATA dg gets corrupted, you can restore Full backup plus Archived RedoLog plus Online Redolog (otherwise you will stop at the latest Archived).
So we have 3 diskgroups for each db instance: DATA, REDO, FRA.
- in case of fail-over cluster (active-passive), Oracle provide some templates of CRS scripts (in $CRS_HOME/crs/crs/public) that you edit and change at your will, also you might create additionale scripts in case of additional resources you might need (Oracle Agents, backups agent, file systems, monitoring tools, etc)
About our problem, the only solution is to move OCR and voting disks from ASM and change pfile af all ASM instance (parameter CLUSTER_DATABASE from true to false ).
Oracle aswers were a litlle bit odd:
- first they told us to use Grid Standalone (without CRS, OCR, voting at all), but we told them that we needed a Fail-over solution
- then they told us to use RAC Single Node, which actually has some better features, in csae of planned fail-over it might be able to migreate
client sessions without causing a reconnect (for SELECTs only, not in case of a running transaction), but we already have a few fail-over cluster, we cannot change them all
So we plan to move OCR and voting disks into block devices (we think that the other solution, which needs a Shared File System, will take longer).
Thanks Marko for pointing us to OCFS2 pros / cons.
We asked Oracle a confirmation that it supported, they said yes but it is discouraged (and also, doesn't work with OUI nor ASMCA).
Anyway that's the simplest approach, this is a non-Prod cluster, we'll start here and if everthing is fine, after a while we'll do it also on Prod ones.
- Note 605828.1, paragraph 5, Configuring non-raw multipath devices for Oracle Clusterware 11g (11.1.0, 11.2.0) on RHEL5/OL5
- Note 428681.1: OCR / Vote disk Maintenance Operations: (ADD/REMOVE/REPLACE/MOVE)
-"Grid Infrastructure Install on Linux", paragraph 3.1.6, Table 3-2
Oscar

Time Machine Failing Over and Over

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Has anyone else had this experience before?
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Sorry I'm not sure I understand your question now.
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So if you simply remove Documents from the TM exclusion list you will run back into the size problem... no good.
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Message was edited by: PieroF

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I would like to get a conversation going on the topic of Replication, I have
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ISE admin , PSN and monitoring node fail-over and fall back scenario

Hi Experts,
I have question about ISE failover .
I have two ISE appliaces in two different location . I am trying to understand the fail-over scenario and fall-back scenario
I have gone through document as well however still not clear.
my Primary ISE server would have primary admin role , primary monitoring node and secondary ISE would have secondary admin and secondary monitoring role .
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We have the same set up across an OTV link and have tested this scenario out multiple times. You don't have to do anything if communication is broken between the prim and secondary nodes. The secondary will automatically start authenticating devices that it is in contact with. If you promote the secondary to primary after the link is broke it will assume the primary role when the link is restored and force the former primary nodes to secondary.

VPN device with dual ISP, fail-over, and load balancing

We currently service a client that has a PIX firewall that connects to multiple, separate outside vendors via IPSEC VPN. The VPN connections are mission critical and if for any reason the VPN device or the internet connection (currently only a T1) goes down, the business goes down too. We're looking for a solution that allows dual-ISP, failover, and load balancing. I see that there are several ASA models as well as the IOS that support this but what I'm confused about is what are the requirements for the other end of the VPN, keeping in mind that the other end will always be an outside vendor and out of our control. Current VPN endpoints for outside vendors are to devices like VPN 3000 Concentrator, Sonicwall, etc. that likely do not support any type of fail-over, trunking, load-balancing. Is this just not possible?

Unless I am mistaken the ASA doesn't do VPN Load Balancing for point-to-point IPSec connections either. What you're really after is opportunistic connection failover, and/or something like DMVPN. Coordinating opportunistic failover shouldn't be too much of an issue with the partners, but be prepared for lot of questions.

Users contacts missing after failing over and then failing back pool

We have 2 Lync enterprise pools that are paired.
3 days ago, I failed the central management store, and all users from pool01 to pool02.
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All users signed back in to Lync and no issues were reported. A user then contacted me to say that his contact list was empty.
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If I perform an export-csuserdata for that user's userdata, the XML file contained within the ZIP file shows the contacts that he is missing.
I've also checked the client log on the workstation too, and can see that Lync can see the contacts as it lists them in the log. They do not appear in the Lync client though.
Environment details:
Lync 2013 - 2 enterprise pools running the latest December 2014 CU updates.
Lync 2013 clients - running on Windows 8.1. User who is experiencing the issue is running client version 15.0.4675.1000 (32 bit)
I have attempted to re-import the user data using both import-csuserdata (and restarting the front end services) and update-csuserdata. Both of these have had no effect.

Hi Eason,
Thanks for your reply. I've doubled checked and can confirm that only one policy exists, which enables it globally.
I believe this problem relates to issues that always seem to happen when ever our primary pool is failed over to the backup pool, and then failed back.
What I often see is that upon pool failback, things like response group announcements don't play on inbound calls (white noise is heard, followed by the call disconnecting), and agents somehow get signed out of queues (although they appear to be signed in to
the queue when checking their Response Group settings in their Lync client. I've also noticed that every time we fail back, a different user will come to me and report that either their entire contacts list is missing, or that half of their contacts are missing.
I am able to restore these from backup though.
This appears to happen regardless of if the failover to the backup pool is due to a disaster, or to simply perform pool maintenance on our primary pool.

Fail Over and Redundancy with UCCE 7.5

I have a customer that is installing UCCE and they want to run side A and side B in stand alone if the visable and private network are both down.. Based on the SRND it states the system looks at the PG with the most active connections and takes over and the other side goes dark. I am desging this in a distributed mode with agants in both sites. Any ideas other than Parent Child.

... the system looks at the PG with the most active connections and takes over and the other side goes dark.
Not quite. Behaviour of a duplex Router pair when the private network breaks is a complex affair.
As you probably know, the MDS pairs form a "synchronized zone" - one MDS will be PAIRED-ENABLED and the other PAIRED-DISABLED.
Consider all the PGs out there. On some PGs, the active link of the pgagent will be connected to the ccagent on the enabled side, while on the remainder of the PGs, the pgagent active link will be connected to the disabled side.
When a pgagent has an active link to the disabled side, that MDS cannot set the message order - it has to send the message to its peer MDS (enabled), who sets the message order, and now both Routers get the message in the same order at the same time.
Therefore, when the private network breaks, any PGs that have the active link connected to the disabled side will realign to the enabled side. The idle side remains connected - it's just a state change.
Idle paths and active paths both count for device majority.
The rules for the enabled side are simple: if it has device majority, it goes straight to ISOLATED-ENABLED. If it doesn't, it goes to ISOLATED-DISABLED.
The disabled side is more complex. First it checks for device majority. If it has this, it initiates the TOS (test other side) process. If every PG it can communicate with reports that it has no communication to the other side, then it will promote itself to ISOLATED-ENABLED.
If the private network breaks and the public network is affected such that neither side has device majority, they both go disabled. Assuming the private link stays down, but the public network starts to come back in stages, eventually the majority of the PGs will be able to talk to one of the disabled sides, and then that will initiate the TOS process, and will go enabled.
Now let's consider what you have - you say "agents at both sites".
Let's imagine for a moment you have a 3rd site and 4th site that have no agents - they are just for the central controller. You have a dedicated link between sites 3 and 4 for the private network, and a public network out to sites 1 and 2
At sites 1 and 2, you have a Call Manager cluster, pair of PGs etc.
If the private network goes down, one of the sides will run simplex until the network is restored. Routing at sites 1 and 2 is unaffected.
If the public network to site 1 is down, routing at site 1 is broken until the network is restored. Site 2 is unaffected.
If the public network to site 2 is down, routing at site 2 is broken until the network is restored. Site 1 is unaffected.
If both networks are down, the whole system is isolated, no routing occurs until the visible has come back to the point where one of the sides will come up as ISOLATED-ENABLED.
Now what happens when we colocate the central controllers at the agent sites as in your model. Have we improved the situation? On the surface it looks like we have - and that's what your customer is saying with "they want to run side A and side B in stand alone if the visable and private network are both down".
When the private link breaks and the public link breaks, each router is ISOLATED-DISABLED and cannot come up because it only sees 1 of 2 PGs (the ones on the LAN at the site). So now you are down on both sites.
You might address this by installing at site 1 a third PG, configured in the normal way (it doesn't do anything) talking to both Call Routers, one local, one remote. It can be simplex.
Now when the private link breaks and the public link breaks, site 1 can see the majority of the PGs so it comes up in ISOLATED-ENABLED. Routing resumes at site 1, but site 2 remains off the air. This is the best result you can achieve.
The most important thing to think about is this: when the private network comes back up, the synchronizers try to do a state transfer. Assuming success, the synchronizers change to PAIRED mode. Now the routers and loggers will exchange state. If each site had been working in simplex mode ("split brain"), then when they come together you will have a totally messed up database. This corrupted state will most likely be unrecoverable.
It has happened in the past. I'll spare you the gory details.

Itunes didnt help user i have all case number from apple and emails

yes itunes didnt help any one also my i have id with 184 dollar and i make it none no visa or paypal and i cant purchase any thing all my information is ok i buy before with it they fix it one time and it come back again and second day i have same massage and 20 days call them every day about 4 hours and put me in hold i know all apple advisor they work good and want to help you but itunes didnt want help i send to them too many emails no one answer me and all they say to advisor security cant tell you and some one else say its locked and other say it blocked and no of that they say come to me on my ipad i think if i call again they will say this account is not verfiy lol i will stop use any thing from apple again they didnt help they give anyanswer and not working

stop. think. open another account. complaining is only healthy to a doctor. Nobody here works for itunes.

80% failed internet and email server connections

We have two computers, mine described below and my husbands (iMac OSX 10.4.8 2GHz Intel Core Duo SDRAM, both with Airport extreme.)
we've had Adelphia High Speed Internet for a year with no problem; almost two weeks ago it switched over to Comcast and we've had trouble ever since. We've jumped through all the hoops Comcast put us through and a repairman came and gave us a new modem. He declared he knew nothing about Macs!! We are at a standstill now. Any ideas?
iBook G4 Mac OS X (10.4.8) 1.33GHz PowerPC G4 processor, 512MB built in memory

IS there a situation with Mac 10.4..8s that prevent it from functioning properly?
No
If that were so, why would we have had NO problem with Adelphia and when they switched over to Comcast it hasn't been working?
Exactly! It is a Comcast issue not a Mac OS issue.
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It sounds like you may be trying to ensure "at least
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YesOK, first the bad news: The Work Manager implementation in Coherence does not have those guarantees.
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What if cluster of cache server dies? Is there any way to find out which Work
objects crashed using only Tangosol features?So you want the work items to survive cluster shut-down. That means that you want them to be persistent. And from your "tlog" comment, I assume you mean transactional as well. None of those qualities is defined by the commonJ spec, but you'll find some of the commonJ implementations (e.g. Redwood) that provide them.
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You can achieve many guarantees (concurrency, etc.) by taking advantage of other features, but obviously there is some work related to this.
Peace.

UCCX Purposely Prevent Fail-over

Hi. I was wondering if shutting down the engine on a secondary server would be enough to prevent fail-over in an HA environment.
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I have to rely on another guy for the router, switches and UCM side of things and he hasn't said exactly what the error message is, but that he called into TACs and it is supposed to only be cosmetic, and a reboot of the router would clear it. Unfortunately, where that router is; it will not be brought down until the end of the year on a maintenance window.
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Am I right? or no need to rebuild the applications?

Hi JFV,
That is no longer the case
How Standby Redundancy Works in Cisco Unity 8.x
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Standby redundancy functions in the following manner:
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Data That Is Not Replicated in Cisco Unity 8.x
Changes to the following Cisco Unity settings are not replicated between the primary and secondary servers. You must manually change values on both servers.
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http://www.cisco.com/en/US/docs/voice_ip_comm/unity/8x/failover/guide/8xcufg040.html#wp1099338
Cheers!
Rob

Bea weblogic 6.1 does not oracle Database fail over

Hi We had Concurrency Strategy:excusive . Now we change that to Database for performace
reasons. Since we change that now when we do oracle database fail over weblogic
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how we can resolve this ??

mt wrote:
Hi We had Concurrency Strategy:excusive . Now we change that to Database for performace
reasons. Since we change that now when we do oracle database fail over weblogic
6.1 does not detect database fail over and it need restart.
how we can resolve this ??Are your pools set to test connections at reserve time?
Joe

Dabase fail over problem after we change Concurrency Strategy:

Hi We had Concurrency Strategy:excusive . Now we change that to Database for performace
reasons. Since we change that now when we do oracle database fail over weblogic
6.1 does not detect database fail over and it need to be rebooted.
how we can resolve this ??

Hi,
It is just faining one of the application servers, developer wrote that when installing CI, Local hostname is written in Database and SDM. We will have to do a Homogeneous system copy to change the name.
The problem is that I used Virtual SAP group name in CI and DI application servers, in SCS and ASCS we used Virtual hostnames and it is OK according to SAP developer.
The Start and instance profiles were checked and everything was fine, just the dispatcher from CI is having problems when comming from Node B to Node A.
Regards

CAS ARRAY fail-over and emails stuck

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