On 2/19/2013 8:30 AM, chamara wrote:
Hi Guys,
I know you all have came across this when doing hardware configuration, If
i use all the bells and whistles version of SAN is that enough to out power
Physical disk?
Also my topology is to have 5 shards in one Machine.
The reasons for or against putting Solr on a SAN are the same as for any
other app. If the SAN is faster than a regular disk for other purposes,
it would probably be faster for Solr too. One caveat - if your index is
write-heavy, which means constant updates with Near RealTime
availability of new content, then you would want to avoid RAID5 or RAID6
volumes on the SAN - go with RAID10. If your index follows the more
typical pattern of infrequent writes, then RAID5/6 would be perfectly
acceptable.
If you are planning a SAN for redundancy purposes, just putting the app
and/or data on a SAN is not enough. You need more than one physical
machine running Solr, each with its own copy of the data. If you are
putting 5 shards per machine, then I would have no less than 8 CPU cores
- typically a dual CPU server where each CPU is quad-core.
The only single-stranded solution that I would consider to be acceptable
isn't really single-stranded - it's a highly available virtual machine
setup where a failure of one physical machine would cause all running
virtual machines to transfer to another physical machine and keep
running as if nothing had happened. That kind of infrastructure is NOT
cheap.
Thanks,
Shawn
