It's physically 4 SATA disks, connected via 3ware RAID controller configured as RAID 1+0. On this RAID10 I have one big LVM volume from which I allocated Logical Volumes to Xen guests. I must point out that this is my staging environment. I can't put it in production yet. I must get some satisfactory results first. In production GlusterFS will reside on a bunch of servers with 2 HDDs with software mirror. Regards, Marko Shehjar Tikoo wrote: > Marko wrote: >> All Xen domains share same physical volume but have theier uniqe >> logical volume. > Please be a bit more specific about the volume. Is it a single large > disk or a bunch of RAIDx disks? > > Thanks > Shehjar > >> So, yes I'd expect performance degradation becouse of that (that is >> why test DHT2 performed better than DHT4). But I cant expect >> performance drop when I use a performance "booster". >> >> Regards, Marko >> >> Shehjar Tikoo wrote: >>> Marko wrote: >>>> Hi Shehjar, >>>> >>>> Answers: 1.) Filesystem is default ext3 mounted with >>>> "defaults,noatime" >>> >>> I see that each server, i.e. iscsi1 and iscsi2, has /srv/gluster as >>> the backend in their corresponding xen domains, but did the xen >>> domains also share the same disks/storage device? >>> >>> Thanks Shehjar >>> >>>> 2.) I think it how it was becouse I always put io-threads as >>>> top(or near top) translator. Iin TEST5 "iot" can be ignored. 3.) >>>> Server(brick) iscsi2 was also client on which I was running the >>>> test and it was also a Xen guest. >>>> >>>> One more thing I'd like to point out. In documentation I miss >>>> information of best practices which translators should be put >>>> before/after other translators. Example: should one put >>>> io-threads before or after io-cache? What does it mean if you >>>> configure either way. >>>> >>>> Regards, Marko >>>> >>>> Shehjar Tikoo wrote: >>>>> Marko wrote: >>>>>> this document is made for my personal reference so it's a >>>>>> little raw. >>>>>> >>>>>> >>>>> >>>>> A few questions: >>>>> >>>>> 1. What was the on-disk file system and the disk organization >>>>> under the file system? >>>>> >>>>> 2. In the TEST5 volfile, the volume iot is dangling. Is that >>>>> how it actually was during the test or was it interposed >>>>> between volume wb and volume AFR? >>>>> >>>>>>> On Wed, Apr 8, 2009 at 6:18 PM, Marko <gluster at sopca.com >>>>>>> <mailto:gluster at sopca.com>> wrote: >>>>>>> >>>>>>> Hello, >>>>>>> >>>>>>> To clearify: * im testing with gluisterfs-2.0.0rc7 * all >>>>>>> bricks are on same physical server(Xen guests). It's a >>>>>>> testing environment. >>>>> >>>>> Were the client side tests( i.e., both the test program like >>>>> make-many-files and the corresponding glusterfs client..) also >>>>> running in a Xen guest? >>>>> >>>>> Thanks Shehjar >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
