Re: [ceph-users] cephfs bandwidth issue

2013-04-24 Thread Elso Andras
Hi I use the kernel module. I found only one mount parameter for readahead: rsize. But didnt help. > These settings are a bit silly. I think what you've got there is > logically equivalent to having the stripe_unit and object_size both > set to 512KB, but I'm not certain. 512KB is also a bit small

Re: [ceph-users] cephfs bandwidth issue

2013-04-16 Thread Gregory Farnum
On Tue, Apr 16, 2013 at 8:47 AM, Elso Andras wrote: > Hi, > > We are serving mp4 videos from cephfs, with lots of random read. > > Here is a graph: http://elbandi.net/ceph/ceph_bandwidth.png > The issue is: there are +50% incoming bandwidth (osd -> cephfs mount, blue > line) compared outgoing band

[ceph-users] cephfs bandwidth issue

2013-04-16 Thread Elso Andras
Hi, We are serving mp4 videos from cephfs, with lots of random read. Here is a graph: http://elbandi.net/ceph/ceph_bandwidth.png The issue is: there are +50% incoming bandwidth (osd -> cephfs mount, blue line) compared outgoing bandwidth (webserver -> internet, green area). the labels are swaped