From mboxrd@z Thu Jan 1 00:00:00 1970 From: erik quanstrom Date: Sat, 4 May 2013 02:17:17 -0400 To: 9fans@9fans.net Message-ID: <4c2af775c003d4295599e99120d4d064@kw.quanstro.net> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] anyone put their venti on an SSD? Topicbox-Message-UUID: 57050d24-ead8-11e9-9d60-3106f5b1d025 On Sat May 4 00:18:46 EDT 2013, cinap_lenrek@gmx.de wrote: > cwfs copies the blocks from worm into the cache on read. > so the working set is served from the ssd and the ram > buffer cache. reading /n/dump would hit the mechanical > disk tho. that's an option for ken's fs. i haven't found that it's fast enough because the latency to retrieve a block that's not in the cache is the latency for read(worm)+read(cachebkt)+ write(cache). if one keeps the cache small, the read of the cachebkt goes away. therefore it's best to keep cachesize << wormsize. - erik