Re: [ceph-users] Ceph counters

2014-10-13 Thread Jakes John
Bump:). It would be helpful, if someone can share info related to debugging using counters/stats On Sun, Oct 12, 2014 at 7:42 PM, Jakes John jakesjohn12...@gmail.com wrote: Hi All, I would like to know if there are useful performance counters in ceph which can help to debug

[ceph-users] Ceph counters

2014-10-12 Thread Jakes John
Hi All, I would like to know if there are useful performance counters in ceph which can help to debug the cluster. I have seen hundreds of stat counters in various daemon dumps. Some of them are, 1. commit_latency_ms 2. apply_latency_ms 3. snap_trim_queue_len 4. num_snap_trimming What

Re: [ceph-users] Bad cluster benchmark results

2014-10-02 Thread Jakes John
for a replica size of 3, maximum write bandwidth must be 120MB * 4 / 3 = 160 MB Thanks On Wed, Oct 1, 2014 at 7:24 PM, Christian Balzer ch...@gol.com wrote: Hello, On Wed, 1 Oct 2014 14:43:49 -0700 Jakes John wrote: Hi Ceph users, I am stuck with the benchmark

[ceph-users] Bad cluster benchmark results

2014-10-01 Thread Jakes John
Hi Ceph users, I am stuck with the benchmark results that I obtained from the ceph cluster. Ceph Cluster: 1 Mon node, 4 osd nodes of 1 TB. I have one journal for each osd. All disks are identical and nodes are connected by 10 G. Below is the dd results dd if=/dev/zero

[ceph-users] Consistent hashing

2014-09-11 Thread Jakes John
Hi, I would like to know few points regarding the consistent hashing of CRUSH algorithm. When I read the algorithm, I noticed that if a selected bucket(device) is failed or overloaded, it skips and selects a new bucket. Similar is the case if collision happens. If such an event happens, how

Re: [ceph-users] Questions regarding Crush Map

2014-09-02 Thread Jakes John
Thanks Loic. On Mon, Sep 1, 2014 at 11:31 PM, Loic Dachary l...@dachary.org wrote: Hi John, On 02/09/2014 05:29, Jakes John wrote: Hi, I have some general questions regarding the crush map. It would be helpful if someone can help me out by clarifying them. 1. I saw that a bucket

[ceph-users] Questions regarding Crush Map

2014-09-01 Thread Jakes John
Hi, I have some general questions regarding the crush map. It would be helpful if someone can help me out by clarifying them. 1. I saw that a bucket 'host' is always created for the crush maps which are automatically generated by ceph. If I am manually creating crushmap, do I need to always