Re: Low write speed

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Hi, Ирек Нургаязович.
Number of PGS is default
"pg_num 64 pgp_num 64"


17.01.2014, 14:39, "Ирек Фасихов" <malmyzh@xxxxxxxxx>:
> Hi, Виталий.
> Whether a sufficient number of PGS?
>
> 2014/1/17 Никитенко Виталий <v1t83@xxxxxxxxx>
>> Good day! Please help me solve the problem. There are the following scheme :
>> Server ESXi with 1Gb NICs. it has local store store2Tb and two isci storage connected to the second server .
>> The second server supermicro: two 1TB hdd (lsi 9261-8i with battery), 8 CPU cores, 32 GB RAM and 2 1Gb NICs . On /dev/sda installed ubuntu 12 and ceph-emperor. /dev/sdb disk placed under osd.0.
>> What i do next:
>>   # rbd create esxi
>>   # rbd map esxi
>>
>> Get /dev/rbd1 which shared using iscsitarget
>>
>>   # cat ietd.conf
>>   Target iqn.2014-01.ru.ceph: rados.iscsi.001
>>     Lun 0 Path = / dev/rbd1, Type = blockio, ScsiId = f817ab
>>   Target iqn.2014-01.ru.ceph: rados.iscsi.002
>>     Lun 1 Path = / opt/storlun0.bin, Type = fileio, ScsiId = lun1, ScsiSN = lun1
>>
>> For test I also create iscsi storage on /dev/sda (Lun1).
>> When migrating a virtual machine from store2Tb to Lun0 (ceph) the rate of migration of 400-450 Mbit/second.
>> When migrating a VM from store2Tb to Lun1 (ubuntu file) then the rate of migration of 800-900 Mbit / second.
>> From this I conclude that the rate is not limited by disk(controller) and not to the network.
>> Tried osd format to ext4 and xfs and btrfs but same speed. For me, speed is very important , especially since the plan
>> translate 10Gb network links.
>> Thanks.
>> Vitaliy
>> _______________________________________________
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>> ceph-users@xxxxxxxxxxxxxx
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>
> --
> С уважением, Фасихов Ирек НургаязовичМоб.: +79229045757
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