Date: Wed, 01 Aug 2001 11:37:33 -0600 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: mjacob@feral.com Cc: "Jose M. Alcaide" <jose@we.lc.ehu.es>, scsi@FreeBSD.ORG Subject: Re: DLT 4000 throughput and cstream Message-ID: <200108011737.f71HbXI66655@aslan.scsiguy.com> In-Reply-To: Your message of "Wed, 01 Aug 2001 08:48:52 PDT." <20010801084833.B57962-100000@wonky.feral.com>
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>On Tue, 31 Jul 2001, Justin T. Gibbs wrote: > >> >It does indeed look like this *might* be a dump issue- but it also could >> >simply be that any single threaded action for dump(8) is going to make for >> >lousy performance. >> >> Dump has lots of issues. I once talked with John Polstra about fixing it. >> The scheme we talked about would have increased dumps performance by ~10X. >> Unfortunately the funding for that project (at my former employer) dried up. > >Was this was for implementing the async i/o stuff that Solaris used? Async I/O, a small cache for data blocks, and a better pipeline. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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