[ovirt-users] Replicated Glusterfs on top of ZFS

[Arman Khalatyan]

Glusterfs now in healing mode:
Receiver:
[root at clei21 ~]# arcstat.py 1
    time  read  miss  miss%  dmis  dm%  pmis  pm%  mmis  mm%  arcsz     c
13:24:49     0     0      0     0    0     0    0     0    0   4.6G   31G
13:24:50   154    80     51    80   51     0    0    80   51   4.6G   31G
13:24:51   179    62     34    62   34     0    0    62   42   4.6G   31G
13:24:52   148    68     45    68   45     0    0    68   45   4.6G   31G
13:24:53   140    64     45    64   45     0    0    64   45   4.6G   31G
13:24:54   124    48     38    48   38     0    0    48   38   4.6G   31G
13:24:55   157    80     50    80   50     0    0    80   50   4.7G   31G
13:24:56   202    68     33    68   33     0    0    68   41   4.7G   31G
13:24:57   127    54     42    54   42     0    0    54   42   4.7G   31G
13:24:58   126    50     39    50   39     0    0    50   39   4.7G   31G
13:24:59   116    40     34    40   34     0    0    40   34   4.7G   31G


Sender
[root at clei22 ~]# arcstat.py 1
    time  read  miss  miss%  dmis  dm%  pmis  pm%  mmis  mm%  arcsz     c
13:28:37     8     2     25     2   25     0    0     2   25   468M   31G
13:28:38  1.2K   727     62   727   62     0    0   525   54   469M   31G
13:28:39   815   508     62   508   62     0    0   376   55   469M   31G
13:28:40   994   624     62   624   62     0    0   450   54   469M   31G
13:28:41   783   456     58   456   58     0    0   338   50   470M   31G
13:28:42   916   541     59   541   59     0    0   390   50   470M   31G
13:28:43   768   437     56   437   57     0    0   313   48   471M   31G
13:28:44   877   534     60   534   60     0    0   393   53   470M   31G
13:28:45   957   630     65   630   65     0    0   450   57   470M   31G
13:28:46   819   479     58   479   58     0    0   357   51   471M   31G


On Thu, Mar 2, 2017 at 7:18 PM, Juan Pablo <pablo.localhost at gmail.com>
wrote:

> hey,
> what are you using for zfs? get an arc status and show please
>
>
> 2017-03-02 9:57 GMT-03:00 Arman Khalatyan <arm2arm at gmail.com>:
>
>> no,
>> ZFS itself is not on top of lvm. only ssd was spitted by lvm for
>> slog(10G) and cache (the rest)
>> but in any-case the ssd does not help much on glusterfs/ovirt  load it
>> has almost 100% cache misses....:( (terrible performance compare with nfs)
>>
>>
>>
>>
>>
>> On Thu, Mar 2, 2017 at 1:47 PM, FERNANDO FREDIANI <
>> fernando.frediani at upx.com> wrote:
>>
>>> Am I understanding correctly, but you have Gluster on the top of ZFS
>>> which is on the top of LVM ? If so, why the usage of LVM was necessary ? I
>>> have ZFS with any need of LVM.
>>>
>>> Fernando
>>>
>>> On 02/03/2017 06:19, Arman Khalatyan wrote:
>>>
>>> Hi,
>>> I use 3 nodes with zfs and glusterfs.
>>> Are there any suggestions to optimize it?
>>>
>>> host zfs config 4TB-HDD+250GB-SSD:
>>> [root at clei22 ~]# zpool status
>>>   pool: zclei22
>>>  state: ONLINE
>>>   scan: scrub repaired 0 in 0h0m with 0 errors on Tue Feb 28 14:16:07
>>> 2017
>>> config:
>>>
>>>     NAME                                    STATE     READ WRITE CKSUM
>>>     zclei22                                 ONLINE       0     0     0
>>>       HGST_HUS724040ALA640_PN2334PBJ4SV6T1  ONLINE       0     0     0
>>>     logs
>>>       lv_slog                               ONLINE       0     0     0
>>>     cache
>>>       lv_cache                              ONLINE       0     0     0
>>>
>>> errors: No known data errors
>>>
>>> Name:
>>> GluReplica
>>> Volume ID:
>>> ee686dfe-203a-4caa-a691-26353460cc48
>>> Volume Type:
>>> Replicate (Arbiter)
>>> Replica Count:
>>> 2 + 1
>>> Number of Bricks:
>>> 3
>>> Transport Types:
>>> TCP, RDMA
>>> Maximum no of snapshots:
>>> 256
>>> Capacity:
>>> 3.51 TiB total, 190.56 GiB used, 3.33 TiB free
>>>
>>>
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>>
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