[ClusterLabs] Problem with high load (IO)

[Lentes, Bernd]

Hi,

i have a two-node cluster running on SLES 12SP5 with two HP servers and a common FC SAN.
Most of my resources are virtual domains offering databases and web pages.
The disks from the domains reside on a OCFS2 Volume on a FC SAN.
Each night a 9pm all domains are snapshotted with the OCFS2 tool reflink.
After the snapshot is created the disks of the domains are copied to a NAS, domains are still running.
The copy procedure occupies the CPU and IO intensively. IO is occupied by copy about 90%, the CPU has sometimes a wait about 50%.
Because of that the domains aren't responsive, so that the monitor operation from the RA fails sometimes.
In worst cases one domain is fenced.
What would you do in such a situation ?
I'm thinking of making the cp procedure nicer, with nice. Maybe about 10.

More ideas ?


Bernd

-- 

Bernd Lentes 
System Administrator 
Institute for Metabolism and Cell Death (MCD) 
Building 25 - office 122 
HelmholtzZentrum München 
bernd.lentes at helmholtz-muenchen.de 
phone: +49 89 3187 1241 
phone: +49 89 3187 3827 
fax: +49 89 3187 2294 
http://www.helmholtz-muenchen.de/mcd 


Public key: 

30 82 01 0a 02 82 01 01 00 b3 72 3e ce 2c 0a 6f 58 49 2c 92 23 c7 b9 c1 ff 6c 3a 53 be f7 9e e9 24 b7 49 fa 3c e8 de 28 85 2c d3 ed f7 70 03 3f 4d 82 fc cc 96 4f 18 27 1f df 25 b3 13 00 db 4b 1d ec 7f 1b cf f9 cd e8 5b 1f 11 b3 a7 48 f8 c8 37 ed 41 ff 18 9f d7 83 51 a9 bd 86 c2 32 b3 d6 2d 77 ff 32 83 92 67 9e ae ae 9c 99 ce 42 27 6f bf d8 c2 a1 54 fd 2b 6b 12 65 0e 8a 79 56 be 53 89 70 51 02 6a eb 76 b8 92 25 2d 88 aa 57 08 42 ef 57 fb fe 00 71 8e 90 ef b2 e3 22 f3 34 4f 7b f1 c4 b1 7c 2f 1d 6f bd c8 a6 a1 1f 25 f3 e4 4b 6a 23 d3 d2 fa 27 ae 97 80 a3 f0 5a c4 50 4a 45 e3 45 4d 82 9f 8b 87 90 d0 f9 92 2d a7 d2 67 53 e6 ae 1e 72 3e e9 e0 c9 d3 1c 23 e0 75 78 4a 45 60 94 f8 e3 03 0b 09 85 08 d0 6c f3 ff ce fa 50 25 d9 da 81 7b 2a dc 9e 28 8b 83 04 b4 0a 9f 37 b8 ac 58 f1 38 43 0e 72 af 02 03 01 00 01
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 2217 bytes
Desc: S/MIME Cryptographic Signature
URL: <https://lists.clusterlabs.org/pipermail/users/attachments/20210927/4fe3387d/attachment.p7s>