On Mon, Aug 12, 2013 at 10:22:47AM +0200, Frédéric VANNIÈRE wrote: > Hello, > > I'm using bcache for Xen hosting. The configuration is : > - Servers HP Proliant DL360 G5/G7/Gen8 > - Backend : HP Smart Array with 2GB write cache (protected), it's a partition like /dev/sda2 > - Cache device : OWC Mercury Accelsior PCIe (2 x Sandforce in RAID0 on Marvell 88SE9230), the whole disk like /dev/sdb > - Cache mode : writethrough > - Kernel : 3.10.5 with bcache driver from 3.11-rc4 > - Setup process : make-bcache -B /dev/sda2 ; make-bcache -C /dev/sdb ; then attached cache device to backend. > - LVM setup : pvcreate /dev/bcache0 , vgcreate xen_data /dev/bcache0 . Each VM has a LV volume on "xen_data" > > On some hosts I've noticed very strange behavior with random mysql crashes, mysql innodb data corruption, filesystem corruption. > > I'm running md5 check on system files each night and compares it to debian's database, on some VMs there where modified files (bad MD5). > When I detached the cache device, dropped virtualmemory cache on guest and synced FS, the MD5 of the files where OK again without rebooting. > > It lookes like bcache had corrupted data in cache, they are no kernel logs on the host, no errors. Ouch... This wasn't occuring on 3.10? -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
