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Continuous Availability and Replication
Posted: 10 Jan 08 8:59 AM
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We are investigating using a Continuous Availability or Replication software for our DB server. We are leaning towards Neverfail but will also demo DoubleTake and XOSoft. Has anyone used any of these type of products on an SLX DB? We are presently on 6.2.6 using SQL 2000 Std. and will continue to use 2000 Std. for some time. Actually while I am asking we are also using MS Dynamics on the DB server so any advise there would also be appreciated.
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Re: Continuous Availability and Replication
Posted: 24 Jan 08 7:46 AM
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I know of folks who have used doubletake... it's expensive but works..
However, Most go for an Active/Passive MS Cluster approach. -- RJLedger - rjlSystems |
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Re: Continuous Availability and Replication
Posted: 25 Jan 08 8:16 AM
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I am using DoubleTake in my environment. The price is not that bad. $499 for one year per license. Figure a simple replication set will run about $1,000 dollars between two systems. Product is robust and well worth it.
I am considering moving to a SAN unit (iSCSI) from a company like Left Hand Networks or HP. Something like that is alittle bit more robust and could probably handle additional data such as Exchange, SQL Databases or flat files served by clients. That type of system also contains replication but you can use your server diskless and serve a image that is replicated between systems. Figure that type of investment is between 30-50k based off 1TB units. |
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Re: Continuous Availability and Replication
Posted: 08 Jul 08 9:29 AM
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We used an MS Cluster for a while with SLX (we were still on SLX v5 at the time iirc) and it worked fairly well. The only problem was that the client didn't seem to handle the "wait a sec, failover in progress" message that it gets from SQL mid-failover, so the clients would get an ugly error if anyone clicked anything during the few seconds of switchover. A refresh would make the client resume with no problems though. No idea if this is addressed in more recent versions of SLX. |
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