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Shared LUN

Shared LUN

Hello,

I have a doubt about the hardware requirements: ¿is necessary a SAN to configure the system as load balancing of web services(this services are out of the cluster servers)?.

Thanks.
7 REPLIES
Steven E. Protter
Exalted Contributor

Re: Shared LUN

Shalom,

The requirements are not that steep. Almost any SAN will do the job.

An HP EVA class disk array has a lot of flexibility, few single points of failure and two channels minimum path to each disk if its going to be an i/o intensive system.

If its not i/o intensive, nearly any SAN will do.

SEP
Steven E Protter
Owner of ISN Corporation
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Serviceguard for Linux
Honored Contributor

Re: Shared LUN

If your Serviceguard cluster does not need shared storage, then you can use a LockLUN and no SAN.

I'm not sure about your question on load balancing. SGLX does failover of applications, including web services. It does not load balance incoming requests to multiple web services.
Serviceguard for Linux
Honored Contributor

Re: Shared LUN

If your Serviceguard cluster does not need shared storage, then you can use a LockLUN and no SAN. If there is state that needs to preserved after a failover, then you do need shared storage.

I'm not sure about your question on load balancing. SGLX does failover of applications, including web services. It does not load balance incoming requests to multiple web services.

Re: Shared LUN

Thanks a lot about yours explanations.

Re: Shared LUN

¿If I will mount a lock lun for my cluster, I need a external disk array?
Serviceguard for Linux
Honored Contributor

Re: Shared LUN

Yes - Lock Lun requires an external array. The MSA500G2 is proabably the lowest cost alternative.

Re: Shared LUN

Thanks a lot