Guys, we have an environment with 3 nodes. Each node have 8x sata 6TB and 2x ssd 200GB for rfcache.

After insert and enable disks for rfcache xenserver is showing log below:

messages:Jan 10 01:47:04 p01-c01-h03 kernel: [ 2730.123284] 8:112: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:06 p01-c01-h03 kernel: [ 2733.083229] 8:80: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:07 p01-c01-h03 kernel: [ 2733.494498] 8:176: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:08 p01-c01-h03 kernel: [ 2734.380540] 8:112: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:08 p01-c01-h03 kernel: [ 2735.026868] 8:128: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:09 p01-c01-h03 kernel: [ 2735.239249] 8:160: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:09 p01-c01-h03 kernel: [ 2735.616695] 8:64: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:09 p01-c01-h03 kernel: [ 2735.896629] 8:96: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:11 p01-c01-h03 kernel: [ 2737.124595] 8:128: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:11 p01-c01-h03 kernel: [ 2737.456669] 8:144: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:11 p01-c01-h03 kernel: [ 2737.719336] 8:80: request aux data allocation failed, iosched may be disturbed

messages:Jan 10 01:47:12 p01-c01-h03 kernel: [ 2738.587153] 8:128: request aux data allocation failed, iosched may be disturbed

I tried with one and two disk in rfcache, same log result. Tested with io scheduler cfq (default) and noop

Any help?

Regards.

Marcelo Lima