EmergencyEMERGENCY? Get 24/7 Help Now!

Level 2 Flash cache is there


Posted on:

|

By:


PREVIOUS POST
NEXT POST
Share Button

As I mentioned in my talk An Overview of Flash Storage for Databases I see in the near and middle term future a lot of interest for using Flash storage in Level 2 caching level. The price-capacity trade-off makes Flash as the very good fit for a cache layer.
Actually it is not the new idea, and it was implemented in L2ARC ZFS for two years already.
It is also described in ACM article “Flash storage memory” by Adam Leventhal.

So I am exciting to see it is available for Linux now. Paul Saab and Mohan Srinivasan from Facebook released Flashcache, which allows to use Flash as cache in front of regular hard drives.

The implementation is based on dm-cache and introduces a new block level device to the system, which you use instead of a regular partition.

I congrats Facebook with implementation of great idea and I am happy to see Facebook releases it under GPL license. I am working on builds to see if we can provide binaries for different platforms.

And, I also see another idea implemented by David Jiang
http://code.google.com/p/david-mysql-tools/wiki/innodb_secondary_buffer_pool, it allows to use a file on Flash partitions as L2 cache for InnoDB buffer pool. I see a lot of potential here, and I am going to evaluate it for including into XtraDB.

Share Button
PREVIOUS POST
NEXT POST


Vadim Tkachenko

Vadim leads Percona's development group, which produces the Percona Server, Percona Server for MongoDB, Percona XtraDB Cluster and Percona XtraBackup. He is an expert in solid-state storage, and has helped many hardware and software providers succeed in the MySQL market.



Tags:

Categories:
Hardware and Storage, MySQL


Comments

Leave a Reply

Percona’s widely read Percona Data Performance blog highlights our expertise in enterprise-class software, support, consulting and managed services solutions for both MySQL® and MongoDB® across traditional and cloud-based platforms. The decades of experience represented by our consultants is found daily in numerous and relevant blog posts.

Besides specific database help, the blog also provides notices on upcoming events and webinars.

Want to get weekly updates listing the latest blog posts? Subscribe to our blog now! Submit your email address below.

No, thank you. Please do not ask me again.