Linux device mapper writecache

Kicking It Into Overdrive

Conclusion

By using the newly introduced dm-writecache device mapper Linux kernel module, you are able to achieve a noticeable improvement in random write throughput when writing to slower disk devices. Also, nothing is preventing you from using the remainder of the NVMe device in the original volume group and mapping it as a cache to other, slower devices on your system.

The Author

Petros Koutoupis is currently a senior performance software engineer at Cray for its Lustre High Performance File System division. He is also the creator and maintainer of the RapidDisk Project. Petros has worked in the data storage industry for well over a decade and has helped to pioneer many of the technologies unleashed in the wild today.

Buy this article as PDF

Express-Checkout as PDF
Price $2.95
(incl. VAT)

Buy ADMIN Magazine

SINGLE ISSUES
 
SUBSCRIPTIONS
 
TABLET & SMARTPHONE APPS
Get it on Google Play

US / Canada

Get it on Google Play

UK / Australia

Related content

comments powered by Disqus
Subscribe to our ADMIN Newsletters
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs



Support Our Work

ADMIN content is made possible with support from readers like you. Please consider contributing when you've found an article to be beneficial.

Learn More”>
	</a>

<hr>		    
			</div>
		    		</div>

		<div class=