From: Josh Steadmon <steadmon@google.com>
To: Derrick Stolee <stolee@gmail.com>
Cc: git@vger.kernel.org, git@jeffhostetler.com, szeder.dev@gmail.com
Subject: Re: [RFC PATCH v3 3/3] trace2: write overload message to sentinel files
Date: Mon, 16 Sep 2019 11:07:43 -0700 [thread overview]
Message-ID: <20190916180743.GA11295@google.com> (raw)
In-Reply-To: <2bb4edc6-f35c-e1e2-7957-17fd994707a0@gmail.com>
On 2019.09.16 08:07, Derrick Stolee wrote:
> On 9/13/2019 8:26 PM, Josh Steadmon wrote:
> > Add a new "overload" event type for trace2 event destinations. Write
> > this event into the sentinel file created by the trace2.maxFiles
> > feature. Bump up the event format version since we've added a new event
> > type.
> >
> > Writing this message into the sentinel file is useful for tracking how
> > often the overload protection feature is triggered in practice.
>
> Putting meaningful data into the sentinel file is valuable. It's
> important to know a bit about when and why this happened. A user
> would be able to inspect the modified time, and the directory info
> you include is unnecessary. The data you include is only for the
> log aggregator to keep valuable data around overloads.
>
> > +`"overload"`::
> > + This event is created in a sentinel file if we are overloading a target
> > + trace directory (see the trace2.maxFiles config option).
> > ++
> > +------------
> > +{
> > + "event":"overload",
> > + ...
> > + "dir":"/trace/target/dir/", # The configured trace2 target directory
> > + "evt":"2", # EVENT format version
> > +}
> That said, do we really need to resort to a new event format and
> event type? Could we instead use the "data" event with a key
> "overload" and put the target dir in the value?
Yeah, that sounds reasonable. Thanks for the suggestion.
next prev parent reply other threads:[~2019-09-16 18:07 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 22:20 [RFC PATCH] trace2: don't overload target directories Josh Steadmon
2019-07-30 13:29 ` Derrick Stolee
2019-07-30 21:52 ` Josh Steadmon
2019-07-30 16:46 ` Jeff Hostetler
2019-07-30 22:01 ` Josh Steadmon
2019-07-30 22:02 ` Josh Steadmon
2019-07-30 18:00 ` Jeff Hostetler
2019-07-30 22:08 ` Josh Steadmon
2019-08-02 22:02 ` [RFC PATCH v2 0/2] " Josh Steadmon
2019-08-02 22:02 ` [RFC PATCH v2 1/2] docs: mention trace2 target-dir mode in git-config Josh Steadmon
2019-08-02 22:02 ` [RFC PATCH v2 2/2] trace2: don't overload target directories Josh Steadmon
2019-08-05 15:34 ` Jeff Hostetler
2019-08-05 18:17 ` Josh Steadmon
2019-08-05 18:01 ` SZEDER Gábor
2019-08-05 18:09 ` Josh Steadmon
2019-09-14 0:25 ` [RFC PATCH v3 0/3] " Josh Steadmon
2019-09-14 0:25 ` [RFC PATCH v3 1/3] docs: mention trace2 target-dir mode in git-config Josh Steadmon
2019-09-14 0:25 ` [RFC PATCH v3 2/3] trace2: don't overload target directories Josh Steadmon
2019-09-14 0:26 ` [RFC PATCH v3 3/3] trace2: write overload message to sentinel files Josh Steadmon
2019-09-16 12:07 ` Derrick Stolee
2019-09-16 14:11 ` Jeff Hostetler
2019-09-16 18:20 ` Josh Steadmon
2019-09-19 18:23 ` Jeff Hostetler
2019-09-19 22:47 ` Josh Steadmon
2019-09-20 15:59 ` Jeff Hostetler
2019-09-16 18:07 ` Josh Steadmon [this message]
2019-10-03 23:32 ` [PATCH v4 0/4] trace2: don't overload target directories Josh Steadmon
2019-10-03 23:32 ` [PATCH v4 1/4] docs: mention trace2 target-dir mode in git-config Josh Steadmon
2019-10-03 23:32 ` [PATCH v4 2/4] docs: clarify trace2 version invariants Josh Steadmon
2019-10-03 23:32 ` [PATCH v4 3/4] trace2: don't overload target directories Josh Steadmon
2019-10-04 0:25 ` Junio C Hamano
2019-10-04 21:57 ` Josh Steadmon
2019-10-04 9:12 ` Johannes Schindelin
2019-10-04 22:05 ` Josh Steadmon
2019-10-03 23:32 ` [PATCH v4 4/4] trace2: write overload message to sentinel files Josh Steadmon
2019-10-04 22:08 ` [PATCH v5 0/4] trace2: discard new traces if the target directory contains too many files Josh Steadmon
2019-10-04 22:08 ` [PATCH v5 1/4] docs: mention trace2 target-dir mode in git-config Josh Steadmon
2019-10-04 22:08 ` [PATCH v5 2/4] docs: clarify trace2 version invariants Josh Steadmon
2019-10-04 22:08 ` [PATCH v5 3/4] trace2: discard new traces if target directory has too many files Josh Steadmon
2019-10-04 22:08 ` [PATCH v5 4/4] trace2: write discard message to sentinel files Josh Steadmon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: http://vger.kernel.org/majordomo-info.html
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190916180743.GA11295@google.com \
--to=steadmon@google.com \
--cc=git@jeffhostetler.com \
--cc=git@vger.kernel.org \
--cc=stolee@gmail.com \
--cc=szeder.dev@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://80x24.org/mirrors/git.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).