[sheepdog] [PATCH] tests: add a test to test vdi snapshot functionality concurrently

[Liu Yuan]

On 09/20/2012 07:40 AM, MORITA Kazutaka wrote:
> But I still wonder if we should rollback to the old cache semantics
> since it looks a bit confusing to me.  The below patch introduces a
> new flag SD_FLAG_CMD_CACHE to skip object cache.  With this patch, all
> collie commands other than 'vdi read' will try to read objects
> directly from the backing store.  Doesn't it work as you expect?

I am afraid not. sd_write_object() should also support direct write as sd_read_object()
because sd_write_object() will also pull in a copy at local node. And also other IO requests (I am
not sure which but I think there is) from collie will need direct mode. That is, only 
'collie vdi write/read' can make request on object cache.


Thanks,
Yuan