Long Distance Storage Replication

Looking for some data on storage replication between data centers connected via VPN. VPN is based on 7206VXR/IOS w/ DS-3 access. DS3 endpoints are the same Tier1 provider. Distance is Miami to/from Chicago.
Replication fo 20Gb SQL Database (initially) in a 12 hour window. Current SQL copy takes roughly 16 hours.
EMC Clarion array replication is next on the plate.

There are many options available to you and would depend on the budget and the infrastructure you already have in place. All of the storage products could provide you with FCIP links. The FCIP link/tunnel would flow inside and as data in the VPN tunnel
There are modules for the 7200's that act as B-port and would encapsulate the data across a FCIP link and so the the endpoints would be the 7200's. Then the SN5428 can provide the same FCIP connectivity and then the FC ports from the storage could plug directly into the 5428.
What may be the best option is the MDS with compression and write acceleration. Depending on the encapsulation of the DS3, the MTU can run from 1500 to 4400. So, the MDS could sit off of a gigabit link from the 7200's and make that MTU on the MDS's gigabit interface the MTU of the (MTU of the DS3-the overhead encapsulation of the VPN). Then you could apply compression and/or write acceleration to give you the FCIP link from MDS to MDS and provide the speed that you desire.

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Synchronous Storage Replication Process

Hi,
I have a question regarding storage replication for synchronous mode. If I describe the process in detail having twin Data Centers called DC-A and DC-B we have:
1- The server in DC-A writes to the DC-A disk.
2- Before the server in DC-A receives an ACK from the DC-A disk, this data is replicated to the other DC disk, DC-B Disk.
3- To replicate the data to the other DC we will first ask to the other DC before passing through the DCI “are you ready to receive”?
4- We will get the approval from DC-B that is ready
5- Then DC-A will send the data through the DCI to arrive to DC-B.
6- DC-B disk receives de data and then DC-B disk must send an ACK to DC-A Disk
7- Once the ACK is received at DC-A disk, DC-A disk will then send the ACK to the server in DC-A which originated the write action.
My question is if step 3 and 4 sometimes are counted and sometimes not. I should counted or not? This decision is important for me because it affects by a factor of 2 the distance between the twin DCs.
Thank you very much for the help.
Regards,
J

Hi,
just to add more information. My doubt comes from the 2 Cisco live sessions about DCI.
On this session it says that we must count 4 times the traffic passing through the DCI in order to know the DCI Distance:
https://www.ciscolive.com/online/connect/sessionDetail.ww?SESSION_ID=6623&backBtn=true
On this other session it says that we must count only 2 times:
https://www.ciscolive.com/online/connect/sessionDetail.ww?SESSION_ID=7775&backBtn=true
Who is right then? because the impact is huge.
Thank you.
Regards,
J

Accessing Oracle DB at multiple location(long distance)

Hi guys,
I have a situation where i need to connect to oracle database which are at long distance(say singapore and UAE). Structure of database is same.
Which is the better way to implement.
1. Using seperate connection for database
Connection conSingapore
Connection conUae
and use diff Statements
or
2. replicating database at single location and accessing centralized database.
Second option is easy as far as java program is concern but what abt replication process? This may cause synchronization(data inconsistancy) problem. Can we use DB link or Materialized views? Has anybody heard tht?
Is there any better way to overcome such situation.
Please help incase anybody has good idea.
Thanks in advance

If I get your intention correct, I would advise to pass in the URL of the db at runtime. That is if you are using the thin driver, you can use the following :
DriverManager.getConnection(url,userName,passWord);you can specify the Database details on runtime so that the connection to the corresponding DB is made.
GoodLuck,
Sekar

Campus cluster with storage replication

Hi all..
we are planning to implement a campus cluster with storage replication over a distance of 4km using remote mirror feature of sun storagetek 6140.
Primary storage ( the one where quorum resides ) and replicated secondary storage will be in separate sites interconnected with dedicated single mode fiber.
The nodes of the cluster will be using primary storage and the data from primary will be replicated to the second storage using remote mirror.
Now in case the primary storage failed completely how the cluster can continue operation with the second storage? what is the procedure ? how does the initial configuration look like?
Regards..
S

Hi,
a high level overview with a list of restrictions can be found here:
http://docs.sun.com/app/docs/doc/819-2971/6n57mi28m?q=TrueCopy&a=view
More details how to set this up can be found at:
http://docs.sun.com/app/docs/doc/819-2971/6n57mi28r?a=view
The basic setup would be to have 2 nodes, 2 storageboxes, TrueCopy between the 2 boxes but no crosscabling. The HAStoragePlus resource being part of a service resource group would use a device that had been "cldevice replicate"ed by the administrator. so that the "same" device could be used on both nodes.
I am not sure how a failover is triggered if the primary storage box failed. But due to the "replication" mentioned above, SC knows how to reconfigure the replication in the case of a failover.
Unfortunately, due to lack of HDS storage in my own lab, I was not able to test this setup; so this is all theory.
Regards
Hartmut
PS: Keep in mind, that the only replication technology integrated into SC today is HDS TrueCopy. If you're thinking of doing manual failovers anyway, you could have a look at the Sun Cluster Geographic Edition which is more a disaster recovery like configuration that combines 2 or more clusters and is able to failover resource groups including replication; this product already supports more replication technologies and will even more in the future. Have a look at http://docsview.sfbay.sun.com/app/docs/coll/1191.3

How do you use a long distance card with iPhone??

I have my long distance card set as a contact but when I dial it and then dial the contact I want to reach it treats it like a seperate call. Anyway around this? Ideally it is just for when I call one area code - in Canada - that I want it to first dial the calling card number as a prefix.
thx in advance

You should compile the FPGA into a bit file. You can then load the bit file in the host VI. This loading should only happen when the host VI is ran.
10 minutes to compile? That is quick!!! I had one that took 2 hours and I've heard stories of some taking a lot longer.
The Producer/Consumer architecture is the closest thing I can compare my setup to. Yes, I use the queues because the host VI is constantly running. You have to use some kind of messaging in order to pass data into the host VI. I used an Action Engine to keep my queues in order, but you could probably just use named queues to accomplish the same task.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

Local skype to go number is long distance

I have a contact skype to go number which is long dsitance as well as my access number for all other calls is a long distance number. How do i get a different skype to go number for a contact as the rest of my contacts are local skype to go numbers

Hello,
Please advise your access number and your other direct dial numbers. Thank you.
TIME ZONE - US EASTERN. LOCATION - PHILADELPHIA, PA, USA.
I recommend that you always run the latest Skype version: Windows & Mac
If my advice helped to fix your issue please mark it as a solution to help others.
Please note that I generally don't respond to unsolicited Private Messages. Thank you.

Switched long distance from At&t to verizon in February still no long distance capabilites, WHY?

Switched long distance from At&t to verizon in February still no long distance capabilites, WHY? I have made numerous calls in the last few months and still am not able to make a long distance call. Do I need to switch back to AT&T. I have been using Skype but doesn't Verizon want the business?

Some verizon people do look here but this forum is mostly for user to user help.
Try "contact us" http://www.verizon.com/contactus

Long Term Storage ideas for Data in an Oracle Database

We have data that we no longer need access to and want to archive it on tapes for long term storage.
We want to save the data using datapump or rman from time to time and and store the exports/backups on tapes. The issue we don't want to face in the future is , if Oracle deprecates the methodology we used to save the data in 2012, we no longer have a way to retrieve the data into a database 10 years from now.
This may sound crazy, but hear me out. Before datapump existed everyone was using vanilla exp to export the data. Now we have datapump as exp's upgrade and we have rman too. What if in 2012 we took an export using datapump or a backup using rman and save it off on a tape. 10 years go by and in 2022 management wants to look at the 2012 data. Lets say by this time Oracle's mothodology changes and they have a much more efficient/robust export/backup method. One way for us to keep the old backups up to date is to import the data back before the method we used in 2012 is deprecated and then export/backup the data using the new method to keep the exports/tapes in sync with then current technology.
My question is, what methods of saving large amounts of data do you recommend/use to save data to a tape so that you don't have to worry about changing times.
An idea I heard is to save the data as insert statements. This would work for most of the data except for blobs.
Any help would be appreciated.
Thanks in advance.

>
Won't an intelligent compression algorithm take care of a lot of the overhead for that?
>
That's certainly a valid point to make and one that the OP can test. And because the duplicated metadata is identical and in the same physical row location there may be compression algorithms that can reduce it to just one set.
There were two points I was trying to make.
1. Don't just save the data - save the metadata also.
2. The metadata for each row will be the same so if you use an INSERT format that duplicates it for every row you are potentially wasting a lot of space.
Your other point was probably more important than these or anything previously mentioned.
>
perform restores of the entire database every couple of years or so to make sure that your
database isn't degrading
>
Regardless of the format and media used to backup the data it is important to verify the integrity of the backup periodically.
There are a lot of ways to do this. One way is a simple MD5 (or other) checksum of data at some level of granularity and then periodically read the data and confirm you still get the same checksum.
In my opinion the more generic the format that the data is saved in the better the odds that you can recover the data later no matter how technology may have changed.

Long distance in local calling area

I have set up some Skype to go numbers in my calling area and some of them are working but when I dial others Bell Canada says the number is a long distance number. Is there any way to chose the number (ie 613 927 XXXX or 613 434 XXXX) instead of it being automatically assigned? ANy help would be appreciated!

a STG number is mapped to a single target number, and that number must always be entered in international dialing format (i.e. exactly the same way you would dial it if you were wanting to call it using SkypeOut on any Skype client)
Regards,
Neil

What is the email for the covent garden apple store (UK), if not apple uk. I am in canada and need to contact THIS store (for an insurance claim) and the phone system won't work for a long distance call.

I am currently living in Canada (but I am from the UK).
I lost my iphone 4S 32GB a couple of weeks ago and I need to try and prove to my insurance company that the iphone was a 32GB.
I was told by an apple store near where i live that the original store where i purchased my iphone may be able to find records on my phone and print out a receipt for me. I can't get through to the Covent Garden apple store in london (where i brought the phone), because the automated phone system that apple uses doesn't seem to like long distance phone calls.
Is there an email for the covent garden store, or for apple uk? I tried toi chat to an apple advisor online, but because of my location i got put through to apple USA.

https://selfserve.apple.com/agreementWarrantyDynamic.do
I noticed an error for some reason, the last two characters should have been do rather than co.

Best method for converting 8 mm cassettes for long term storage

I have approximately one hundred 8 mm video cassette tapes that I would like to convert to another format for long term storage. I captured my first tape today from my camera Sony DCR VTR 520 which is a digital 8 mm camera. I was not planning to convert the files to DVDs at this time but just keep the avi file on the computer.   The video was just over 2 hours long but the file ends up being 27 GB.   I expecting it to be around 8 GB like a 2 hr DVD but I guess its not the same.
The 8 mm tape I converted was from an very old 8 mm camera which I no longer have (1990). The camera used to capture from is a VTR 520 which is actually a Sony digital 8 mm, which can play back standard 8 mm. I used CS3 on my old computer with standard project settings for DV NTSC 29.97 f/s.   I currently use PE10 so I could use either program.
What do other people use to convert and store videos on??
If I want to keep them as avi files will I have to live with these large file sizes?
I did a search on the forum and found titles that talk about this subject from a couple of years ago but when I click on them they don't come up.   How do you see these older threads?
Any help would be appreciated.

JMJarige,
The only potential problems with this workflow are:
DVR units (I have a Panasonic, but this is pretty much across the board) seldom produce a 100% DVD-compliant disc, and as most add a rudimentary Menu & navigation system to the disc, produce a first VOB (where the Menus & navigation are located), that is tough, if not impossible to directly Import.
In the production to DVD, there is MPEG2 compression applied. If one edits that material, and then they output to any compressed CODEC, the quality loss is easily seen
When I convert from VHS for a client, I create a DVR DVD disc, for their archives (in case the tapes die), but then Capture to DV-AVI to be edited to a DVD-Video. The client gets two sets of discs - one that is produced by the DRV, and then one that is the finished edit of their tapes. For me, it's a two step process, but gives them a backup, plus a finished product.
Good luck,
Hunt

Monitor vibration over long distance ( 300m)

Hi everyone,
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1. Using ENET-9234:
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http://digital.ni.com/public.nsf/allkb/C86BF63CC73C6721862575F2005A246D
These recommendations are not suitable either due to harsh contion in the sea and difficult maintenance.
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Thank you very much!
Have a great week ahead!
PQH

I also like the cRIO approach. There are copper to fiber media converters on the market that offer single mode fiber which is what you would need for the longer distance.
Check out the following tools to help you get up and running quickly with cRIO:
This listing is an attempt to list and briefly describe core tools that speed the development of waveform acquisition and analysis applications on the CompactRIO and RT platforms.
NI CompactRIO Developers Guide: This is a core developer's guide for a wide range of waveform acquisition and analysis applications. It provides useful background on CompactRIO and control applications in particular. It has chapters on waveform acquisition as well as deployment and management of applications on CompactRIO.
http://www.ni.com/compactriodevguide/
Reference Applications for cRIO Waveform Acquisition: This is the core template for acquiring waveforms for analysis, including vibration, electrical power, and structural monitoring. It makes a great starting point for waveform applications on cRIO.
http://zone.ni.com/devzone/cda/epd/p/id/6206
cRIO Reference Designs for Structural Health Monitoring: This reference builds on the waveform acquisition reference and adds scan engine for slowly changing signals as well as TDMS data logging on event.
http://zone.ni.com/devzone/cda/tut/p/id/9851
Simple Messaging Reference Library (STM): This tool provides a TCP/IP communications protocol which is used in the benchmarks shown on the waveform acquisition reference page. It is an excellent tool for efficient communications between cRIO and a host, easily supporting time waveform live streaming.
http://zone.ni.com/devzone/cda/epd/p/id/2739
Reference Library for Converting Between LabVIEW and XML Data (GXML): This reference provides a remote XML configuration tool, to be used for remote configuration of the cRIO LabVIEW application.
http://zone.ni.com/devzone/cda/epd/p/id/6330
LabVIEW Syslog Protocol Reference Library: This reference offers a UDP cRIO status monitor to indicate to the host the operational status of the remote cRIO
http://forums.ni.com/ni/board/message?board.id=Components&thread.id=51
Reference Applications for cRIO Order Analysis Using a High Speed Tach: This reference offers tachometer or encoder interpretation in FPGA when the I/O device is in a separate and higher speed loop.
http://zone.ni.com/devzone/cda/epd/p/id/6301
DSA Module Synchronization Reference Design for Multiple cRIO Chassis: This reference is useful when the timing of I/O needs to be tightly synchronized between two cRIO chassis. It works with a signal line, as well as with GPS.
http://zone.ni.com/devzone/cda/epd/p/id/6146
Additional NI Systems Engineering Components are listed here: Additional tools can be found on the Systems Engineering Components discussion forum.
http://forums.ni.com/ni/board?board.id=Components
Hope this helps you get started with cRIO, which is a great choice for industrial oil platform applications for temperature, and Class 1 Div 2 certifications.
Preston Johnson
Principal Sales Engineer
Condition Monitoring Systems
Vibration Analyst III - www.vibinst.org, www.mobiusinstitute.com
National Instruments
[email protected]
www.ni.com/mcm
www.ni.com/soundandvibration
www.ni.com/biganalogdata
512-683-5444

Is Sun Storage 7000 Storage replication adapter compatible with 2540 series

We are evaluating VMWare Site Recovery Manager 4.0. Is Sun Storage 7000 Storage replication adapter compatible with 2540 Sun Storage series?

I would say the short answer would be no. The 2540 is a LSI based device, the SRM adapter for that is written by LSI. The 7000
series array is based on OpenSolaris and ZFS, quite a different beast.

L3 Link for Storage Replication

Hi,
Has anyone experienced on provisioning L3 MPLS link for Storage Replication. I have two DC at different location and EMC Storage.
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Hi Micky,
Such table doesn´t exist in standard SAP! You should try to accomplish this in a view!

Configure Storage Replication - where to create Source Log Disk

Hey guys,
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Prerequisites and answers for most setup questions can be found here:
http://social.technet.microsoft.com/Forums/windowsserver/en-US/f843291f-6dd8-4a78-be17-ef92262c158d/getting-started-with-windows-volume-replication?forum=WinServerPreview&prof=required
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