David Mohr <[email protected]> schrieb: > On 2015-04-06 09:44, arnaud gaboury wrote: >> Here is my overall plan: >> >> root filesystem & OS on a SSD >> DB and other stuff on HD. >> Use ssd as caching device and HD as backing. >> >> Shall I partition the SSD with : one partition for OS and one empty >> for bcache? Or install the OS on the whole SSD and use the whole SSD >> as caching device? >> >> Thank you for hint. > > So this is just depending on your preference, how big the SSD is, and > how much space you expect your OS to take up. > > Personally I split my SSD into two partitions: one for the root FS, and > the other as a caching device for /home.
The other preference is valid, too: I chose to put bcache only on the SSD to get maximum benefit from its capacity, rootfs and home dynamically share the cache then depending on demands. So rootfs is a bit slower as natively on SSD but home can gain much more because unsed parts of the rootfs are available for caching. The split-setup preference in turn gives you a fallback boot option in case bcache chokes: You still have a working rootfs to do repairs or restore backups. In my setup I encounter that problem with a working USB3-HD mirror of my system I can boot and restore from which is synced and snapshotted every night (so it also protects against accidental file deletion synced undetected into the backup). Most valuable data is stored remotely (photos, source code, documents, configuration, etc). -- Replies to list only preferred. -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
