From: Michael Haggerty <mhagger@alum.mit.edu>
To: Junio C Hamano <gitster@pobox.com>, Jeff King <peff@peff.net>
Cc: "Duy Nguyen" <pclouds@gmail.com>, "Johannes Sixt" <j6t@kdbg.org>,
"Torsten Bögershausen" <tboegi@web.de>,
"Git Mailing List" <git@vger.kernel.org>
Subject: Re: [PATCH v4 00/32] Lockfile correctness and refactoring
Date: Fri, 12 Sep 2014 13:13:16 +0200 [thread overview]
Message-ID: <5412D54C.5030602@alum.mit.edu> (raw)
In-Reply-To: <xmqq7g1bifm0.fsf@gitster.dls.corp.google.com>
On 09/10/2014 06:51 PM, Junio C Hamano wrote:
> [...]
> I am wondering if it makes sense to maintain a single ref that
> reaches all the commits in this shared object store repository,
> instead of keeping these millions of refs. When you need to make
> more objects kept and reachable, create an octopus with the current
> tip and tips of all these refs that causes you to wish making these
> "more objects kept and reachable". Obviously that won't work well
> if the reason why your current scheme uses refs is because you
> adjust individual refs to prune some objects---hence the first
> question in this message.
This is an interesting idea.
I wouldn't trust git to handle efficiently commits with thousands of
parents, but it would be easy to knit a huge number of tips together
using multiple layers of, say, 16-parent octopus merges.
Michael
--
Michael Haggerty
mhagger@alum.mit.edu
next prev parent reply other threads:[~2014-09-12 11:13 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-06 7:50 [PATCH v4 00/32] Lockfile correctness and refactoring Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 01/32] unable_to_lock_die(): rename function from unable_to_lock_index_die() Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 02/32] api-lockfile: expand the documentation Michael Haggerty
2014-09-09 22:40 ` Junio C Hamano
2014-09-06 7:50 ` [PATCH v4 03/32] rollback_lock_file(): do not clear filename redundantly Michael Haggerty
2014-09-11 19:13 ` Ronnie Sahlberg
2014-09-06 7:50 ` [PATCH v4 04/32] rollback_lock_file(): exit early if lock is not active Michael Haggerty
2014-09-11 19:13 ` Ronnie Sahlberg
2014-09-06 7:50 ` [PATCH v4 05/32] rollback_lock_file(): set fd to -1 Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 06/32] lockfile: unlock file if lockfile permissions cannot be adjusted Michael Haggerty
2014-09-09 22:39 ` Junio C Hamano
2014-09-12 11:03 ` Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 07/32] hold_lock_file_for_append(): release lock on errors Michael Haggerty
2014-09-09 22:41 ` Junio C Hamano
2014-09-12 11:04 ` Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 08/32] lock_file(): always add lock_file object to lock_file_list Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 09/32] lockfile.c: document the various states of lock_file objects Michael Haggerty
2014-09-11 19:57 ` Ronnie Sahlberg
2014-09-06 7:50 ` [PATCH v4 10/32] cache.h: define constants LOCK_SUFFIX and LOCK_SUFFIX_LEN Michael Haggerty
2014-09-11 22:15 ` Ronnie Sahlberg
2014-09-12 16:44 ` Michael Haggerty
2014-09-11 22:42 ` Ronnie Sahlberg
2014-09-12 17:13 ` Michael Haggerty
2014-09-12 17:32 ` Ronnie Sahlberg
2014-09-06 7:50 ` [PATCH v4 11/32] delete_ref_loose(): don't muck around in the lock_file's filename Michael Haggerty
2014-09-13 7:41 ` Johannes Sixt
2014-09-14 6:27 ` Michael Haggerty
2014-09-14 6:38 ` Michael Haggerty
2014-09-14 14:49 ` Johannes Sixt
2014-09-06 7:50 ` [PATCH v4 12/32] prepare_index(): declare return value to be (const char *) Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 13/32] write_packed_entry_fn(): convert cb_data into a (const int *) Michael Haggerty
2014-09-11 19:55 ` Ronnie Sahlberg
2014-09-06 7:50 ` [PATCH v4 14/32] lock_file(): exit early if lockfile cannot be opened Michael Haggerty
2014-09-11 22:49 ` Ronnie Sahlberg
2014-09-06 7:50 ` [PATCH v4 15/32] remove_lock_file(): call rollback_lock_file() Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 16/32] commit_lock_file(): inline temporary variable Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 17/32] commit_lock_file(): die() if called for unlocked lockfile object Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 18/32] commit_lock_file(): if close fails, roll back Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 19/32] commit_lock_file(): rollback lock file on failure to rename Michael Haggerty
2014-09-10 7:55 ` Jeff King
2014-09-10 12:55 ` Duy Nguyen
2014-09-06 7:50 ` [PATCH v4 20/32] api-lockfile: document edge cases Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 21/32] dump_marks(): remove a redundant call to rollback_lock_file() Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 22/32] git_config_set_multivar_in_file(): avoid " Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 23/32] lockfile: avoid transitory invalid states Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 24/32] struct lock_file: declare some fields volatile Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 25/32] try_merge_strategy(): remove redundant lock_file allocation Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 26/32] try_merge_strategy(): use a statically-allocated lock_file object Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 27/32] commit_lock_file(): use a strbuf to manage temporary space Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 28/32] Change lock_file::filename into a strbuf Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 29/32] resolve_symlink(): use a strbuf for internal scratch space Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 30/32] resolve_symlink(): take a strbuf parameter Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 31/32] trim_last_path_elm(): replace last_path_elm() Michael Haggerty
2014-09-06 7:50 ` [PATCH v4 32/32] Extract a function commit_lock_file_to() Michael Haggerty
2014-09-07 14:21 ` [PATCH v4 00/32] Lockfile correctness and refactoring Torsten Bögershausen
2014-09-12 12:50 ` Michael Haggerty
2014-09-08 22:35 ` Junio C Hamano
2014-09-10 8:13 ` Jeff King
2014-09-10 10:25 ` Duy Nguyen
2014-09-10 10:30 ` Jeff King
2014-09-10 16:51 ` Junio C Hamano
2014-09-10 19:11 ` Jeff King
2014-09-12 11:28 ` Michael Haggerty
2014-09-12 11:13 ` Michael Haggerty [this message]
2014-09-12 14:21 ` Michael Haggerty
2014-09-13 18:51 ` Jeff King
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