[ceph-users] Disabling write cache on SATA HDDs reduces write latency 7 times

Marc Roos M.Roos at f1-outsourcing.eu
Sun Nov 11 04:54:47 PST 2018


 
WD Red here






-----Original Message-----
From: Ashley Merrick [mailto:singapore at amerrick.co.uk] 
Sent: zondag 11 november 2018 13:47
To: Vitaliy Filippov
Cc: Marc Roos; ceph-users
Subject: Re: [ceph-users] Disabling write cache on SATA HDDs reduces 
write latency 7 times

Either more weird then, what drives is in the other cluster?

On Sun, 11 Nov 2018 at 7:19 PM, Vitaliy Filippov <vitalif at yourcmc.ru> 
wrote:


	It seems no, I've just tested it on another small cluster with HDDs 
only -  
	no change
	
	> Does it make sense to test disabling this on hdd cluster only?
	
	-- 
	With best regards,
	   Vitaliy Filippov
	




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