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authorDan McGee <dan@archlinux.org>2011-12-12 09:58:53 -0600
committerDan McGee <dan@archlinux.org>2011-12-12 09:59:42 -0600
commit56af1e4f50587333da4e8c38800be8f720af98b7 (patch)
treebf3a9ea9110b8941ddb86d1d886e2a5f471fb705 /devel/management/commands
parent99eada17224b54799e7c2331a2b88dee76420107 (diff)
reporead: more efficient deletion of files
Rather than delegating to Django and batch deletion by ID, force issuing of a single delete query to clear out all existing file objects when necessary. This should speed up the deletion and update of packages with a lot of files by a non-trivial amount. Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'devel/management/commands')
-rw-r--r--devel/management/commands/reporead.py10
1 files changed, 9 insertions, 1 deletions
diff --git a/devel/management/commands/reporead.py b/devel/management/commands/reporead.py
index 7e058afc..aa04a31f 100644
--- a/devel/management/commands/reporead.py
+++ b/devel/management/commands/reporead.py
@@ -239,6 +239,12 @@ pkg_same_version = lambda pkg, dbpkg: pkg.ver == dbpkg.pkgver \
and pkg.rel == dbpkg.pkgrel and pkg.epoch == dbpkg.epoch
+def delete_pkg_files(dbpkg):
+ database = router.db_for_write(Package, instance=dbpkg)
+ cursor = connections[database].cursor()
+ cursor.execute('DELETE FROM package_files WHERE pkg_id = %s', [dbpkg.id])
+
+
def populate_files(dbpkg, repopkg, force=False):
if not force:
if not pkg_same_version(repopkg, dbpkg):
@@ -253,7 +259,7 @@ def populate_files(dbpkg, repopkg, force=False):
# only delete files if we are reading a DB that contains them
if repopkg.has_files:
- dbpkg.packagefile_set.all().delete()
+ delete_pkg_files(dbpkg)
logger.info("adding %d files for package %s",
len(repopkg.files), dbpkg.pkgname)
for f in repopkg.files:
@@ -262,6 +268,7 @@ def populate_files(dbpkg, repopkg, force=False):
filename = None
# this is basically like calling dbpkg.packagefile_set.create(),
# but much faster as we can skip a lot of the repeated code paths
+ # TODO use Django 1.4 bulk_create
pkgfile = PackageFile(pkg=dbpkg,
is_directory=(filename is None),
directory=dirname + '/',
@@ -361,6 +368,7 @@ def db_update(archname, reponame, pkgs, force=False):
with transaction.commit_on_success():
# no race condition here as long as simultaneous threads both
# issue deletes; second delete will be a no-op
+ delete_pkg_files(dbpkg)
dbpkg.delete()
# packages in both database and in syncdb (update in database)