Jump to content
Warrentheo

Why is "Writeback" the default cache setting for new drives on new VM domains?

2 posts in this topic Last Reply

Recommended Posts

Why is "Writeback" the default cache setting for new drives on new VM domains?  I understand this to not be 100% bulletproof and would cause issues with random system power loss...

 

Should we have this default instead to "Writethrough"?  The fastest cache setting with no possible data corruption?

 

Would like the option to select from the cache options on the advanced VM edit page...

 

See this page for smarter people than me, and why IBM/Redhat defaults to "Writethrough": https://www.ibm.com/support/knowledgecenter/en/linuxonibm/liaat/liaatbpkvmguestcache.htm 

Share this post


Link to post

Hi,

 

I've been looking into this and whilst I don't know the ins or outs or partially understand the merits in relation to performance gains, I found this article helpful.

 

https://doc.opensuse.org/documentation/leap/virtualization/html/book.virt/cha.cachemodes.html

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now