* Jonathan Dieter: > On Wed, 2019-05-29 at 20:15 -0600, Chris Murphy wrote: >> 'dnf info deltarpm' says >> URL : http://gitorious.org/deltarpm/deltarpm >> which has an expired certificate, but pushing passed that it says >> current version 3.6 is 5 years old. Is this really maintained or >> updatabled? > > Upstream has changed to > https://github.com/rpm-software-management/deltarpm. The code is still > maintained, but there's not much active development. I can't speak for > the upstream maintainer, but I would guess that a PR that adds zstd > support would probably be welcomed. There's also the matter of increased CPU usage on the client, due to deltrapm reconstruction. But I do wonder if we can just stop using deltarpms altogether. I ran the script below on three Fedora installations, and I got: total: count=7 size=1487.4 downloaded=1468.9 savings=18.5 (1.24%) total: count=45 size=3444.2 downloaded=3360.3 savings=83.9 (2.44%) total: count=36 size=4115.6 downloaded=3975.3 savings=140.3 (3.41%) Even when taking into account that the deltarpm metadata needs to be download as well (at a cost of maybe 10 KiB per update), there are still real savings, but they are pretty slim. Thanks, Florian #!/usr/bin/python3 # Note: gzip path has not been tested. import decimal import glob import gzip import re import sys RE_DELTARPM = re.compile( r'[0-9TZ:-]+ INFO (?:Failed )?Delta RPMs (?:reduced|increased)' + r' ([0-9.]+) MB of updates to ([0-9.]+) MB .*') updates = 0 total_sum = decimal.Decimal() download_sum = decimal.Decimal() for logfile in glob.glob("/var/log/dnf.log*"): if logfile.endswith(".gz"): opener = lambda path: gzip.open(path, "r") else: opener = open with opener(logfile) as inp: for lineno, line in enumerate(inp, 1): if "Delta RPMs" in line: m = RE_DELTARPM.match(line) if m is None: sys.stderr.write("{}:{}: invalid line: {!r}\n".format( logfile, lineno, line)) else: updates += 1 total, download = m.groups() total = decimal.Decimal(total) download = decimal.Decimal(download) print("update: size={} downloaded={} savings={}".format( total, download, total - download)) total_sum += total download_sum += download savings = total_sum - download_sum print("total: count={} size={} downloaded={} savings={} ({:.3}%)".format( updates, total_sum, download_sum, savings, (100 * savings) / total_sum)) _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
