On Tue, Oct 20, 2015 at 11:51:07AM +0500, Bogdan Vasiliev wrote: > Hello, > > I have dm-cache configuraion with SSD in writeback mode. On every boot > an entire cache resyncs to an origin device, even if it was clean > before on shutdown. It takes time and full bandwidth of an origin > device. > > Is there reason for this behavior or is it a bug? Why we do not trust > a cache metadata? If the cache is not taken down cleanly then dm-cache has to assume every block is dirty. Make sure your shutdown scripts are removing the cache device. > > My configuration details, if necessary: > storage-cache_cdata:0 41943040 linear > storage-cache_cmeta: 0 1048576 linear > storage-data: 0 1953513472 cache 8 989/131072 128 173945/327680 610488 > 20046 574861 3817439 0 0 0 1 writeback 2 migration_threshold 2048 mq > 10 random_threshold 4 sequential_threshold 512 > discard_promote_adjustment 1 read_promote_adjustment 4 > write_promote_adjustment 8 rw - > storage-data_corig: 0 1953513472 linear > > > - Bogdan > > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
