On 03/11/2015 02:49 PM, Fam Zheng wrote: > On Wed, 03/11 14:44, Wen Congyang wrote: >> On 03/03/2015 03:59 PM, Fam Zheng wrote: >>> On Tue, 03/03 15:53, Wen Congyang wrote: >>>> I test qcow2_make_empty()'s performance. The result shows that it may >>>> take about 100ms(normal sata disk). It is not acceptable for COLO. So >>>> I think disk buff is necessary(just use it to replace qcow2). >>> >>> Why not tmpfs or ramdisk? >> >> Another problem: >> After failover, secondary write request will be written in (active disk)? >> It is better to write request to (nbd target). Is there any feature can >> be reused to implement it? > > You can use block commit or stream to move the data.
Can the job stream move the data? I don't find the write ops in block/stream.c. Thanks Wen Congyang > > Fam > > . >
