From: Junio C Hamano <email@example.com> To: "Ævar Arnfjörð Bjarmason" <firstname.lastname@example.org> Cc: Git Mailing List <email@example.com>, Jeff King <firstname.lastname@example.org>, email@example.com Subject: Re: upload-pack is slow with lots of refs Date: Wed, 03 Oct 2012 12:13:08 -0700 [thread overview] Message-ID: <firstname.lastname@example.org> (raw) In-Reply-To: <CACBZZX70NTic2WtrXooTg+yBbiFFDAEX_Y-b=W=rAkcYKJ3T2g@mail.gmail.com> (=?utf-8?B?IsOGdmFyIEFybmZqw7Zyw7A=?= Bjarmason"'s message of "Wed, 3 Oct 2012 14:36:00 +0200") Ævar Arnfjörð Bjarmason <email@example.com> writes: > I'm creating a system where a lot of remotes constantly fetch from a > central repository for deployment purposes, but I've noticed that even > with a remote.$name.fetch configuration to only get certain refs a > "git fetch" will still call git-upload pack which will provide a list > of all references. It has been observed that the sender has to advertise megabytes of refs because it has to speak first before knowing what the receiver wants, even when the receiver is interested in getting updates from only one of them, or worse yet, when the receiver is only trying to peek the ref it is interested has been updated. I do not think upload-pack that runs on the sender side with millions refs, when asked for a single "want", feeds all the refs that it has to the revision machinery, and if you observed it does, I cannot explain why it happens.
prev parent reply other threads:[~2012-10-04 21:49 UTC|newest] Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-10-03 12:36 Ævar Arnfjörð Bjarmason 2012-10-03 13:06 ` Nguyen Thai Ngoc Duy 2012-10-03 18:03 ` Jeff King 2012-10-03 18:53 ` Junio C Hamano 2012-10-03 18:55 ` Jeff King 2012-10-03 19:41 ` Shawn Pearce 2012-10-03 20:13 ` Jeff King 2012-10-04 21:52 ` Sascha Cunz 2012-10-05 0:20 ` Jeff King 2012-10-05 6:24 ` Johannes Sixt 2012-10-05 16:57 ` Shawn Pearce 2012-10-08 15:05 ` Johannes Sixt 2012-10-09 6:46 ` Shawn Pearce 2012-10-09 20:30 ` Johannes Sixt 2012-10-09 20:46 ` Johannes Sixt 2012-10-03 20:16 ` Ævar Arnfjörð Bjarmason 2012-10-03 21:20 ` Jeff King 2012-10-03 22:15 ` Ævar Arnfjörð Bjarmason 2012-10-03 23:15 ` Jeff King 2012-10-03 23:54 ` Ævar Arnfjörð Bjarmason 2012-10-04 7:56 ` [PATCH 0/4] optimizing upload-pack ref peeling Jeff King 2012-10-04 7:58 ` [PATCH 1/4] peel_ref: use faster deref_tag_noverify Jeff King 2012-10-04 18:24 ` Junio C Hamano 2012-10-04 8:00 ` [PATCH 2/4] peel_ref: do not return a null sha1 Jeff King 2012-10-04 18:32 ` Junio C Hamano 2012-10-04 8:02 ` [PATCH 3/4] peel_ref: check object type before loading Jeff King 2012-10-04 19:06 ` Junio C Hamano 2012-10-04 19:41 ` Jeff King 2012-10-04 20:41 ` Junio C Hamano 2012-10-04 21:59 ` Jeff King 2012-10-04 8:03 ` [PATCH 4/4] upload-pack: use peel_ref for ref advertisements Jeff King 2012-10-04 8:04 ` [PATCH 0/4] optimizing upload-pack ref peeling Jeff King 2012-10-04 9:01 ` Ævar Arnfjörð Bjarmason 2012-10-04 12:14 ` Nazri Ramliy 2012-10-03 22:32 ` upload-pack is slow with lots of refs Ævar Arnfjörð Bjarmason 2012-10-03 23:21 ` Jeff King 2012-10-03 23:47 ` Ævar Arnfjörð Bjarmason 2012-10-03 19:13 ` Junio C Hamano [this message]
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