On 21 May 2013 19:05, Samuel Just <sam.just@xxxxxxxxxxx> wrote: > Do you use xattrs at all? Yes, on each object we set between 2 to 4 attributes at write time which are then left unchanged. /Emil > -Sam > > On Tue, May 21, 2013 at 9:34 AM, Anders Saaby <anders@xxxxxxxxx> wrote: >> On 21/05/2013, at 18.19, Gregory Farnum <greg@xxxxxxxxxxx> wrote: >>> On Tue, May 21, 2013 at 9:01 AM, Emil Renner Berthing <ceph@xxxxxxxx> wrote: >>>> On 21 May 2013 17:55, Gregory Farnum <greg@xxxxxxxxxxx> wrote: >>>>> On Tue, May 21, 2013 at 8:44 AM, Emil Renner Berthing <ceph@xxxxxxxx> wrote: >>>>>> Hi Greg, >>>>>> >>>>>> Here are some more stats on our servers: >>>>>> - each server has 64GB ram, >>>>>> - there are 12 OSDs pr. server, >>>>>> - each OSD uses around 1.5 GB of memory, >>>>>> - we have 18432 PGs, >>>>>> - around 5 to 10 MB writes/s is written to each OSD and almost no reads (yet). >>>>> >>>>> What interface are you writing with? How many OSD servers are there? >>>> >>>> We're using librados and there are 132 OSDs so far. >>> >>> Okay, so the allocation is happening in the depths of LevelDB — maybe >>> the issue is there somewhere. Are you doing anything weird with omap, >>> snapshots, or xattrs? >> >> I can help; No, we are not using omap, snaps or weird stuff with xattrs. >> >> We are storing objects of sizes from few KB to GBs. Also, we have a quirk in the application design right now, which means that we store an object, write it again under a new name and delete the original object. - if that is of any potential value to finding this. >> >> >> -- >> Anders >> -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
