Shared LUN

[Albert Malvehy]

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.

[Steven E. Protter]

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

[Serviceguard for Linux]

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]

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.

[Albert Malvehy]

Thanks a lot about yours explanations.

[Albert Malvehy]

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

[Serviceguard for Linux]

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

[Albert Malvehy]

Thanks a lot