Do you use xattrs at all? -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
