July 12, 20169 yr Hi i know you can create a raid 1 using -dconvert=raid0 -mconvert=raid1 but is the btrfs raid 1 stripped across both drives giving a faster read off the cache or does it just use the drives normally but not mirrored?
July 13, 20169 yr Author With that setting, the data is raid0 and the metadata is raid1 ah okay so should I use -dconvert=raid1 -mconvert=raid1
July 13, 20169 yr Community Expert With that setting, the data is raid0 and the metadata is raid1 ah okay so should I use -dconvert=raid1 -mconvert=raid1 That is the default setting, a raid1 mirror.
July 14, 20169 yr Hi i know you can create a raid 1 using -dconvert=raid0 -mconvert=raid1 but is the btrfs raid 1 stripped across both drives giving a faster read off the cache or does it just use the drives normally but not mirrored? I think you might have confused RAID 0 and RAID 1 in your question. It makes much mores sense like this: Hi i know you can create a raid 0 using -dconvert=raid0 -mconvert=raid1 but is the btrfs raid 0 stripped across both drives giving a faster read off the cache or does it just use the drives normally but not mirrored? If that's what you meant then the answer is that the data is striped for speed but the filesystem metadata (which, in comparison, is much smaller) is mirrored for redundancy.
July 14, 20169 yr Author Hi i know you can create a raid 1 using -dconvert=raid0 -mconvert=raid1 but is the btrfs raid 1 stripped across both drives giving a faster read off the cache or does it just use the drives normally but not mirrored? I think you might have confused RAID 0 and RAID 1 in your question. It makes much mores sense like this: Hi i know you can create a raid 0 using -dconvert=raid0 -mconvert=raid1 but is the btrfs raid 0 stripped across both drives giving a faster read off the cache or does it just use the drives normally but not mirrored? If that's what you meant then the answer is that the data is striped for speed but the filesystem metadata (which, in comparison, is much smaller) is mirrored for redundancy. Ha yes thanks thats exactly what i meant. Raid 0. I was wondering if adding a cache drive in raid 0 would give me any kind of performance boost on the cache. Thanks for seeing past my mistake!! What is the advantage of mirroring the files system for redundancy if the data doesnt have redunduncy?
July 14, 20169 yr I don't think there's much to be gained from striping the metadata, but added safety from mirroring it.
July 15, 20169 yr What is the advantage of mirroring the files system for redundancy if the data doesnt have redunduncy? In theory it should help recover / prevent file system errors.
Archived
This topic is now archived and is closed to further replies.