dm-cache is a generic block-level cache utility based on Linux device mapper framework.
Questions tagged [dm-cache]
5 questions
23
votes
2 answers
What are the advantages/disadvantages of different SSD to HDD cacheing options (dm-cache, flashcashe...)?
There appear to be various different technologies available to use an SSD to act as a cache for HHDs. The ones I know of:
dm-cache (by Redhat - in the 3.9 Kernel, so it should be in ubuntu 13.10)
Flashcache (developed and used by facebook)
Bcache…
Uli
- 5,196
11
votes
2 answers
How to install Ubuntu with both disk encryption AND SSD caching
I'm using Ubuntu in a corporate environment, and our security policy states that we have to use full disk encryption.
I've also got a laptop with a 32GB mSATA SSD and 750GB of spinning rust. My current installation uses bcache to leverage this,…
Adrian
- 5,256
3
votes
1 answer
How to add an SSD cache to an encrypted HDD for desktop/GUI use?
SSHDs seem to be stuck at 4TB and 8GB SSD cache (one model is available with 1TB/32GB) while bigger SSDs are widely available and some solutions exist to to pair an HDD with an SSD in Linux. I'm looking for a solution that is easy to use on a…
LiveWireBT
- 29,597
2
votes
1 answer
What happens in bcache if the cache ssd dies?
I'm creating a NAS and I've been doing a lot of research on the different SSD caches. I have a 120gb ssd which is more than enough for the OS so I want to use most of it as a cache for the md raid5 array. Before I commit to this setup I want to know…
cowmix
- 71
0
votes
1 answer
Can I configure dm-cache to only cache small files?
We're deploying an Active Directory domain controller slash file server in a small NGO, using Ubuntu Server/Samba and a conventional HDD, due to budgetary concerns.
I'm concerned about the dismal random 4K access rate of conventional spinning drives…
MrValueType
- 101