Re: [ceph-users] Experience with 5k RPM/archive HDDs

2017-02-02 Thread Irek Fasikhov
Hi, Maxime. Linux SMR is only starting with version 4.9 kernel. С уважением, Фасихов Ирек Нургаязович Моб.: +79229045757 2017-02-03 10:26 GMT+03:00 Maxime Guyot : > Hi everyone, > > > > I’m wondering if anyone in the ML is running a cluster with archive type > HDDs,

[ceph-users] CephFS read IO caching, where it is happining?

2017-02-02 Thread Ahmed Khuraidah
Hi all, I am still confused about my CephFS sandbox. When I am performing simple FIO test into single file with size of 3G I have too many IOps: cephnode:~ # fio payloadrandread64k3G test: (g=0): rw=randread, bs=64K-64K/64K-64K/64K-64K, ioengine=libaio, iodepth=2 fio-2.13 Starting 1 process

Re: [ceph-users] CephFS read IO caching, where it is happining?

2017-02-02 Thread Wido den Hollander
> Op 2 februari 2017 om 15:35 schreef Ahmed Khuraidah : > > > Hi all, > > I am still confused about my CephFS sandbox. > > When I am performing simple FIO test into single file with size of 3G I > have too many IOps: > > cephnode:~ # fio payloadrandread64k3G > test:

[ceph-users] Split-brain in a multi-site cluster

2017-02-02 Thread Ilia Sokolinski
Hi, We are testing a multi-site CEPH cluster using 0.94.5 release. There are 2 sites with 2 CEPH nodes in each site. Each node is running a monitor and a bunch of OSDs. The CRUSH rules are configured to require a copy of data in each site. The sites are connected by a private high-speed link. In

[ceph-users] Experience with 5k RPM/archive HDDs

2017-02-02 Thread Maxime Guyot
Hi everyone, I’m wondering if anyone in the ML is running a cluster with archive type HDDs, like the HGST Ultrastar Archive (10TB@7.2k RPM) or the Seagate Enterprise Archive (8TB@5.9k RPM)? As far as I read they both fall in the enterprise class HDDs so *might* be suitable for a low

Re: [ceph-users] CephFS read IO caching, where it is happining?

2017-02-02 Thread Shinobu Kinjo
You may want to add this in your FIO recipe. * exec_prerun=echo 3 > /proc/sys/vm/drop_caches Regards, On Fri, Feb 3, 2017 at 12:36 AM, Wido den Hollander wrote: > >> Op 2 februari 2017 om 15:35 schreef Ahmed Khuraidah : >> >> >> Hi all, >> >> I am still

Re: [ceph-users] Split-brain in a multi-site cluster

2017-02-02 Thread Gregory Farnum
On Thu, Feb 2, 2017 at 8:01 AM, Ilia Sokolinski wrote: > Hi, > > We are testing a multi-site CEPH cluster using 0.94.5 release. > There are 2 sites with 2 CEPH nodes in each site. > Each node is running a monitor and a bunch of OSDs. > The CRUSH rules are configured to