All Questions
19
questions
0
votes
1
answer
959
views
It possible use SSD as cache?
I have a linux media server that I use mainly with plex and Serviio(dlna server). I have a t400 4gb gpu (transcoding), 16GB ddr4 ram and an i7-6700 cpu. Now, I have 3 SSDs: 1TB for movies, 250GB for ...
0
votes
2
answers
2k
views
Creating an SSD partition with a different block size
I am trying to put together a complex setup (Debian) that uses LUKS+LVM+LVM cache in a mixed SSD+HD environment.
To use a partition on the SSD (partition size for lvmcache volumes: 20 GB) as the LVM ...
- 154
5
votes
2
answers
1k
views
LVMCache: Why use a cachepool instead of a cachevol?
I'm aware of the differences between a cachepool and cachevol.
Cachepool separates the cache data and metadata into two separate volumes, whereas a Cachevol uses a single volume for both.
My question ...
- 236
0
votes
2
answers
870
views
Using dm-cache for transparent ongoing backup
Is there any chance to use dm-cache for ongoing SSD backup?
I want to have very fast and cheap eventually consistent failure resistant partition.
Use case:
We have regular ssd (1Gb) (cache) + hdd (...
1
vote
1
answer
422
views
Reduce wear of SDD / EXT4 / Frequent overwrites of files
I'd like to configure GNU/Linux in a way that the wear of the solid-state disk (SSD) is reduced as much as possible.
Setting: Some programs are frequently ran that overwrite small debug output files (...
- 111
1
vote
0
answers
1k
views
Wait to Mount Until Process Not Busy
I am writing/reading to an SSD over NVMe. I would like to unmounts the SSD partitions and remount them after writing and before reading so as to avoid caching problems. It seems when I try to perform ...
- 41
0
votes
1
answer
2k
views
How to use SSD on ZFS-based system?
I understand ZFS uses / can be set up to use an SSD as L2ARC cache, ZIL, as well as host for a deduplication table.
None of these appear to require a fixed minimum size (the deduplication table might,...
- 115
3
votes
0
answers
1k
views
Disable caching for entire file system or disk?
I have a 1TB M.2 SSD drive that I use for regularly creating really large tarballs. It just has an ext4 file system on it at the moment. Is there some way I can tell the kernel not to cache data on ...
- 147
1
vote
0
answers
505
views
device-mapper error while setup of dm-cache
I am trying to setup dmcache using the tutorial https://wiki.mikejung.biz/Dmcache
When I run the command
`dmsetup create home-cached --table '0 976771120 cache /dev/mapper/ssd-metadata /dev/mapper/...
- 435
6
votes
1
answer
2k
views
LVM cache and TRIM
I have set up LVM to cache a logical volume (located on an HDD) on a partition of an SSD (in writeback mode if this matters). As far as I can tell, this works correctly and the cache uses all ...
- 276
0
votes
0
answers
91
views
SSD as write target during reads
I have a real-time application which always writes data to a RAID 10 HDD configuration in a sequential manner at around ~50 MB/s. It uses mmap and writing should never be blocked due to waiting I/O.
...
- 167
1
vote
0
answers
2k
views
ssd caching in loop device on btrfs
I have an ssd and 2TB hard disk. The ssd is used for the root filesystem which uses only around 20G of the 120G available.
Is there a way to use an image/loop on the root filesystem (btrfs) as a cache ...
- 3,183
1
vote
1
answer
1k
views
Change Linux Bcache device type
I have accidentally configured my SSD as a backing device instead of a caching device. Simply trying either one of the following:
sudo make-bcache -C /dev/sdb1
sudo make-bcache -C /dev/sdb
Gives the ...
- 325
10
votes
1
answer
685
views
How to know what is cached by dm-cache?
I am using dm-cache successfully for quite a while now. Now I would like to know which files are being currently in the cache. I understand that dm-cache works with blocks, not files, but since there ...
- 1,105
12
votes
1
answer
3k
views
How to use an SSD for caching, so my hard disks can spin down?
I've got a file server with a bunch of disks running together in a BTRFS pool and want to add an SSD for caching. I'm not mainly after speeding up things, but want to catch the regular small accesses ...
- 2,343