Hi Mark, Although I'm sure the type of query would make a big diff so would lessen the value of your scenario profile vs others, If you observed the I/O bottleneck in practice (my guess likely network related), I'm curious enough if you could describe a little of the scenario, eg queries per second type and size of network connection between the Host(s) and SAN number of data and query nodes Thx if available, Tony
On Wednesday, February 5, 2014 2:47:44 PM UTC-8, Mark Walkom wrote: > You probably don't want to run ES with a large number of nodes off a SAN > due to the IO requirements. > We run ES on a XenServer cluster, everything is on local disk though and > we push redundancy up the stack and let ES handle it with replicas. > > Regards, > Mark Walkom > > Infrastructure Engineer > Campaign Monitor > email: ma...@campaignmonitor.com <javascript:> > web: www.campaignmonitor.com > > > On 6 February 2014 04:11, Tony Su <tony...@gmail.com <javascript:>> wrote: > >> IMO >> >> I would generally design the Guest images to run on local storage, not in >> a SAN to decrease load on the network links. The Guest image shouldn't be >> very large, anyway. >> Data should be stored in the SAN for shared access. >> >> Aside from that, any networking issues as usual depends on the hardware >> and your configuration. Maybe you need fatter pipes or more pipes to your >> SAN, but if you're currently running multiple Guest images in the SAN >> that'd likely be a major load by itself. >> >> Another thing you can do is use a distro/OS with recent architecture. A >> couple years ago leading several Linux distros starting moving many of >> their mountpoints into tmpfs which means they're running in RAM instead of >> hitting your hard drive. In fact, for those OS, if you don't store data in >> local storage, after initial boot the disks aren't touched much. Of course, >> this won't generally include the "Long Term" distro versions but IMO Java >> apps like ES aren't likely subject to changes in the OS outside the JVM. >> >> HTH, >> Tony >> >> >> >> >> On Wednesday, February 5, 2014 8:42:43 AM UTC-8, mooky wrote: >> >>> Thanks Tony. >>> >>> I have had a few issues before with linux VM environment (ESX) >>> - like single points of failure. SAN goes down, you lose all your >>> servers. >>> - like SAN controller gets saturated, and IOWait on all servers goes >>> through the roof - everything runs veery slow. >>> - I have heard other anecdotes regarding networking - and the ESX >>> drivers not coping under heavy load. We certainly had loads of networking >>> related problems - that many times we weren't able to get to the bottom - >>> and the environment support personnel lacked the talent/resources to figure >>> it out either. >>> - many many problems due to oversubscription (but thats just down to the >>> environment being run by muppets). >>> >>> -N >>> >>> >>> >>> On Wednesday, 5 February 2014 15:45:09 UTC, Tony Su wrote: >>>> >>>> Although I'm running on a different VMware product, I've run other >>>> things than ES on VMware before. >>>> IMO is a good platform, no unusual issues. >>>> >>>> Just the usual things... >>>> If the VM was created on a different machine, then you may need to >>>> verify no partition alignment issues. >>>> >>>> In my current ES testing, most of my bottlenecks is the disk I/O. >>>> Curiously, Marvel isn't reporting disk usage in the red, but it's >>>> obviously >>>> the most loaded of the various resources being used (So, maybe it's not a >>>> real bottleneck?). My current storage is shared SATA/SAS. >>>> >>>> Like always, if you're dealing with SSD, <know> about write >>>> amplification and how to deal with it depending on whatever Guest OS you >>>> use. >>>> >>>> Tony >>>> >>>> >>>> >>>> On Wednesday, February 5, 2014 7:22:08 AM UTC-8, mooky wrote: >>>> >>>>> What's the general opinion about running elasticsearch on VMWare ESX >>>>> VM's? >>>>> Are many people running elasticsearch reliably in this kind of env? >>>>> Assuming the VM is set up with dedicated/guaranteed mem/cpu, are there >>>>> any things to be concerned/worried about? >>>>> >>>>> Disc IO Performance? SAN vs local HDD (local SSD). >>>>> Network IO Performance? driver issues ... >>>>> >>>>> Many thanks >>>>> >>>>> -N >>>>> >>>> -- >> You received this message because you are subscribed to the Google Groups >> "elasticsearch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to elasticsearc...@googlegroups.com <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elasticsearch/a5ad4e79-5e4b-45d5-9ba5-d3797b3cd5d9%40googlegroups.com >> . >> >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/1f9d90a6-6c4a-40bb-a598-e2e676ec3506%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
