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From: Eric Wong <e@yhbt.net>
To: meta@public-inbox.org
Subject: [PATCH 04/20] v2writable: index_sync: reduce fill_alternates calls
Date: Fri, 24 Jul 2020 05:55:50 +0000	[thread overview]
Message-ID: <20200724055606.27332-5-e@yhbt.net> (raw)
In-Reply-To: <20200724055606.27332-1-e@yhbt.net>

Instead of doing fill_alternates for every epoch we're indexing,
just do it once at the start of index_sync invocation.  This
will set us up for using a single "git cat-file" process for
indexing multiple epochs.
---
 lib/PublicInbox/V2Writable.pm | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/lib/PublicInbox/V2Writable.pm b/lib/PublicInbox/V2Writable.pm
index 04c91e5dd..c896dc0ed 100644
--- a/lib/PublicInbox/V2Writable.pm
+++ b/lib/PublicInbox/V2Writable.pm
@@ -682,10 +682,7 @@ sub fill_alternates ($$) {
 
 	my $pfx = "$self->{-inbox}->{inboxdir}/git";
 	my $all = "$self->{-inbox}->{inboxdir}/all.git";
-
-	unless (-d $all) {
-		PublicInbox::Import::init_bare($all);
-	}
+	PublicInbox::Import::init_bare($all) unless -d $all;
 	my $info_dir = "$all/objects/info";
 	my $alt = "$info_dir/alternates";
 	my (%alt, $new);
@@ -695,7 +692,9 @@ sub fill_alternates ($$) {
 		$mode = (stat($fh))[2] & 07777;
 
 		# we assign a sort score to every alternate and favor
-		# the newest (highest numbered) one when we
+		# the newest (highest numbered) one because loose objects
+		# require scanning epochs and only the latest epoch is
+		# expected to see loose objects
 		my $score;
 		my $other = 0; # in case admin adds non-epoch repos
 		%alt = map {;
@@ -1213,7 +1212,6 @@ sub index_epoch ($$$) {
 	my $git_dir = git_dir_n($self, $i);
 	die 'BUG: already reindexing!' if $self->{reindex_pipe};
 	-d $git_dir or return; # missing epochs are fine
-	fill_alternates($self, $i);
 	my $git = PublicInbox::Git->new($git_dir);
 	if (my $unindex_range = delete $sync->{unindex_range}->{$i}) {
 		unindex($self, $sync, $git, $unindex_range);
@@ -1247,6 +1245,7 @@ sub index_sync {
 	my $latest = git_dir_latest($self, \$epoch_max);
 	return unless defined $latest;
 	$self->idx_init($opt); # acquire lock
+	fill_alternates($self, $epoch_max);
 	$self->{over}->rethread_prepare($opt);
 	my $sync = {
 		unindex_range => {}, # EPOCH => oid_old..oid_new

  parent reply	other threads:[~2020-07-24  5:56 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-24  5:55 [PATCH 00/20] indexing changes and new features Eric Wong
2020-07-24  5:55 ` [PATCH 01/20] index: support --rethread switch to fix old indices Eric Wong
2020-07-24  5:55 ` [PATCH 02/20] v2: index forwards (via `git log --reverse') Eric Wong
2020-07-24  5:55 ` [PATCH 03/20] v2writable: introduce idx_stack Eric Wong
2020-07-24  5:55 ` Eric Wong [this message]
2020-07-24  5:55 ` [PATCH 05/20] v2writable: move {autime} and {cotime} into $sync state Eric Wong
2020-07-24  5:55 ` [PATCH 06/20] v2writable: allow >= 40 byte git object IDs Eric Wong
2020-07-24  5:55 ` [PATCH 07/20] v2writable: drop "EPOCH.git indexing $RANGE" progress Eric Wong
2020-07-24  5:55 ` [PATCH 08/20] use consistent {ibx} field for writable code paths Eric Wong
2020-07-24  5:55 ` [PATCH 09/20] search: avoid copying {inboxdir} Eric Wong
2020-07-24  5:55 ` [PATCH 10/20] v2writable: use read-only PublicInbox::Git for cat_file Eric Wong
2020-07-24  5:55 ` [PATCH 11/20] v2writable: get rid of {reindex_pipe} field Eric Wong
2020-07-24  5:55 ` [PATCH 12/20] v2writable: clarify "epoch" comment Eric Wong
2020-07-24  5:55 ` [PATCH 13/20] xapcmd: set {from} properly for v1 inboxes Eric Wong
2020-07-24  5:56 ` [PATCH 14/20] searchidx: rename _xdb_{acquire,release} => idx_ Eric Wong
2020-07-24  5:56 ` [PATCH 15/20] searchidx: make v1 indexing closer to v2 Eric Wong
2020-07-24  5:56 ` [PATCH 16/20] index+xcpdb: support --no-sync flag Eric Wong
2020-07-24  5:56 ` [PATCH 17/20] v2writable: share log2stack code with v1 Eric Wong
2020-07-24  5:56 ` [PATCH 18/20] searchidx: support async git check Eric Wong
2020-07-24  5:56 ` [PATCH 19/20] searchidx: $batch_cb => v1_checkpoint Eric Wong
2020-07-24  5:56 ` [PATCH 20/20] v2writable: {unindexed} belongs in $sync state Eric Wong

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