[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2014-09-13 Thread Bráulio
*** This bug is a duplicate of bug 570805 ***
https://bugs.launchpad.net/bugs/570805

really slow here on a updated trusty. several minutes to update; before
it was a few seconds!

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  My computer updates are very slow since latest dpkg update

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2011-03-06 Thread Phillip Susi
This was fixed upstream and made it into Natty, so marking development
task as fixed.

** Changed in: dpkg
   Importance: Medium = Unknown

** Changed in: dpkg
   Status: Confirmed = Unknown

** Changed in: dpkg
 Remote watch: Linux Kernel Bug Tracker #15910 = Debian Bug tracker #584254

** Changed in: dpkg (Ubuntu)
   Status: Triaged = Fix Released

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2011-03-06 Thread Phillip Susi
*** This bug is a duplicate of bug 570805 ***
https://bugs.launchpad.net/bugs/570805

** This bug has been marked a duplicate of bug 570805
   [regression] dpkg's fsync causes massive regression in Ubuntu Server and 
Alternate installation times
 * You can subscribe to bug 570805 by following this link: 
https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/570805/+subscribe

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2011-02-03 Thread Bug Watch Updater
** Changed in: dpkg
   Importance: Unknown = Medium

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2011-01-24 Thread Bug Watch Updater
** Changed in: dpkg
   Status: Unknown = Confirmed

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-09-14 Thread Philip Muškovac
see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=584254 for adding a
--force-unsafe-io option. (Can someone please really implement that? the
sync() calls are wasting a lot of time if you use pbuilder frequently)

** Bug watch added: Debian Bug tracker #584254
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=584254

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-09-12 Thread zzarko
I have the same problem, system slowdown and a very long updates. I have the 
measurement for speed-dreams package 1.4.0 installed from command line (sudo 
dpkg -i speed*) for Ubuntu 9.10 and 10.04. Both installations are on the same 
machine, same HD (different partitions, ext4 for 10.04, ext3 fot 9.10), and 
speed-dreams files (~320MB) are on a another HD. Results for unpacking phase 
are:
9.10 : 9s
10.04 : 36s
which is way more than two times slowdown...
If it is acceptable by Colin Watson, could there be at least an opton of 
choosing should fsyncs be done new or old way? I.e. dpkg --nofysync or 
something?

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-06-30 Thread Q
We use a PXE environment to deploy user laptops based on Ubuntu.

The installation process is a real pain due to this issue. Hardware is
stressed a lot, the hard drive of our notebooks are constantly making
grinding noises.

A full desktop installation takes more than an hour which is just
unnecessary. Especially during installation, protection against disk
crashes is not relevant.

Please, please revert whatever may have changed, to revert it.  Or
provide a preseed option to disable this behavior. It is slow and is
mangling our hard drives.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-06-02 Thread jgreenso
Forgive me if this is unrelated but we've just installed 10.04 from a
network install cd onto a Dell R210 with RAID-1 using ext4 as /. The
disks report back damn fast using hdparm -tT and using dd, but when dpkg
says it's unpacked it's files there seems to be a massive delay before
progressing to configuring the packages. Are we seeing this bug too or
something similar?

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Re: [Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-06-02 Thread Jakob Unterwurzacher
Am 02/06/10 17:45, schrieb jgreenso:
 Forgive me if this is unrelated but we've just installed 10.04 from a
 network install cd onto a Dell R210 with RAID-1 using ext4 as /. The
 disks report back damn fast using hdparm -tT and using dd, but when dpkg
 says it's unpacked it's files there seems to be a massive delay before
 progressing to configuring the packages. Are we seeing this bug too or
 something similar?

Looks like the same thing, but different bug#:
https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/570805

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-05-12 Thread Michael Kofler
I guess this bug also causes the massive slow-down during the Ubuntu
installation (compared to earlier Ubuntu versions).

I had already several reports about the standard installation hanging at
95 % (or whatever other percentage). At this point the dpkg database is
built/updated/whatever. The installation does not really hang, but
depending on how slow your disk is, this step can take up to 15 minutes
(perhaps even longer on really old computers).

This also affects the alternate installation, but in a somewhat lesser
degree (according to my own experiences).

When Ubuntu 10.04 has nearly achieved a boot time of 10 seconds (it's
more like 20 seconds on my computers, but it really boots much faster
than before), installation time has almost quadrupled :-( One step
forwards here, one step backwards there

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-05-08 Thread Bertrand Mathieu
My concern is not related to the time it takes, but the disk activity
and loss of responsiveness during package updates: it's all about user
perception.

When the change has been introduced, I noticed a lot of writes to the disk with 
a lot of time spent in syscall (quite normal for frequent fsync).
My immediate reaction was to suspect that the hard drive of upcoming failure, 
since it behaved like it had difficulties to read or write (and then I found 
this bug report). I think that regular users may be confused too by this 
behavior.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-05-05 Thread Jean-Baptiste Lallement
** Bug watch added: Linux Kernel Bug Tracker #15910
   http://bugzilla.kernel.org/show_bug.cgi?id=15910

** Also affects: dpkg via
   http://bugzilla.kernel.org/show_bug.cgi?id=15910
   Importance: Unknown
   Status: Unknown

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-04-28 Thread Colin Watson
Jean-Baptiste, could you please report an upstream bug about this on
bugzilla.kernel.org, since you have the reproduction recipe to hand?
(ext4 upstream isn't particularly keen on Launchpad.)

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-04-27 Thread Phillip Susi
The build daemons, brand new installs and certain other environments
really don't care if the install is corrupted during a crash, and so
would very much prefer to disable the syncing if this could be changed
to a runtime option that can be defeated.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-04-20 Thread Jean-Baptiste Lallement
Philip, the 247 reporters of the original report (#512096) didn't
intentionally break their system. I suppose that most of them don't even
know what data=writeback is.

To reproduce it on a fresh lucid setup:
- to be sure that the right mount options are set add 
auto_da_alloc,data=ordered to the ext4 line in fstab and remount.
- install a previous version of dpkg (e.g 
http://archive.ubuntu.com/ubuntu/pool/main/d/dpkg/dpkg_1.15.4ubuntu2_i386.deb)
- simulate a crash:
$ apt-get install bsdgames ; sleep 5; echo b  /proc/sysrq-trigger

When your system as rebooted, see all those 0 bytes files:
$ ls -l /var/lib/dpkg/info/bsdgames.*
$ ls -ld $( dpkg -L bsdgames )

auto_da_alloc doesn't even detect the replace via rename situation (in
fact it does, but only in the simplest cases)

Once the files in /var/lib/dpkg/info/ and /var/lib/dpkg are corrupted
there is no other to recover than running some manual operations. Which
are like black magic to the common user who generally end up with a
complete reinstall. Users can complain about performance but won't
complain about loosing their data.

This situation is not specific to dpkg. Try :
$ ar x dpkg_1.15.4ubuntu2_i386.deb; sleep 5; echo b  /proc/sysrq-trigger
it will leave 0 bytes files too. 

It's not the place to discuss about it since this report is about performance, 
but I don't think the solution is to add fsyncs to all the applications around 
and it is not realistic. 
The solution is to fix ext4 itself. To draw a parallel, there is no single 
database engine leaving empty rows when a transaction failed. Why should a fs 
behave differently ?

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Re: [Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-04-20 Thread Phillip Susi
On 4/20/2010 6:31 AM, Jean-Baptiste Lallement wrote:
 auto_da_alloc doesn't even detect the replace via rename situation
 (in fact it does, but only in the simplest cases)

Ahh, so it *IS* broken, even with data=ordered.

 It's not the place to discuss about it since this report is about
 performance, but I don't think the solution is to add fsyncs to all
 the applications around and it is not realistic. The solution is to
 fix ext4 itself. To draw a parallel, there is no single database
 engine leaving empty rows when a transaction failed. Why should a fs
 behave differently ?

Yes, ext4 should be fixed then.  A rename() replacing an existing file
must act as a barrier causing the new file to be flushed before the
rename is committed.

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Re: [Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-04-19 Thread Colin Watson
To be perfectly honest, a factor of two is acceptable in my view when
the trade-off is *hard failures* elsewhere.  I believe I was already
quite clear about this on IRC, but I'm not going to change this further
for Lucid.  Sorry.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-04-19 Thread Colin Watson
And BTW it is definitely not anywhere near as bad as before from all the
measurements I've taken and seen.

** Changed in: dpkg (Ubuntu Lucid)
Milestone: ubuntu-10.04-beta-1 = None

** Changed in: dpkg (Ubuntu Lucid)
   Importance: Critical = Medium

** Changed in: dpkg (Ubuntu Lucid)
 Assignee: Colin Watson (cjwatson) = (unassigned)

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-04-19 Thread Phillip Susi
I believe that the failure only occurs when you intentionally *BREAK*
your filesystem by using data=writeback, so a factor of two performance
penalty for a protection that is unneeded on the default data=ordered
mode is unacceptable to me.  At the very least the syncing should only
be done if data=writeback is detected, or the syncing and renaming
should be delayed until after all packages are unpacked if possible, so
that it is only done once.

Leaving this in for lucid release to be on the safe side is probably the
right thing to do at this point, but this should be revisited later.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-04-18 Thread Phillip Susi
Reopening this bug since -ubuntu4 has reintroduced it.  It may not be as
bad as before, since cjwatson said on irc that syncing is now only
performed after unpacking all files in a single package, but I just
tested upgrading beta 2 to current and the time to upgrade went from
6m21s to 11m15s.

To test I made a clean install of beta 2 to a new lv on my ssd, booted
into the new install, ran apt-get update ; apt-get upgrade -d to
download all the files needed.  Then I booted back to my main install
and made a backup of the test volume using dd.  Booted back into test
system and locked the version of dpkg to -ubuntu3 and ran a time apt-get
upgrade -y.  I then booted my main system and restored the dd backup,
booted back into the test volume, and first upgraded dpkg to -ubuntu4,
then again ran time apt-get upgrade -y.

It seems that this fix may be to solve a problem caused by people
using data=writeback mount option on ext4, which is documented to be
unsafe, and comes at a hefty cost to upgrade a number of packages at
once.  Because of this I feel this fix should be reverted.


** Changed in: dpkg (Ubuntu Lucid)
   Status: Fix Released = Triaged

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-16 Thread Colin Watson
** Also affects: dpkg (Ubuntu Lucid)
   Importance: Undecided
   Status: Confirmed

** Changed in: dpkg (Ubuntu Lucid)
   Status: Confirmed = In Progress

** Changed in: dpkg (Ubuntu Lucid)
   Importance: Undecided = Critical

** Changed in: dpkg (Ubuntu Lucid)
 Assignee: (unassigned) = Colin Watson (cjwatson)

** Changed in: dpkg (Ubuntu Lucid)
Milestone: None = ubuntu-10.04-beta-1

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-16 Thread Launchpad Bug Tracker
** Branch linked: lp:ubuntu/dpkg

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-16 Thread Launchpad Bug Tracker
This bug was fixed in the package dpkg - 1.15.5.6ubuntu3

---
dpkg (1.15.5.6ubuntu3) lucid; urgency=low

  * Revert fsync during package unpack for now; it's unacceptably slow for
packages with lots of small files, and we can't ship beta-1 this way.
We'll do something better once it's decided upstream (LP: #537241).
 -- Colin Watson cjwat...@ubuntu.com   Tue, 16 Mar 2010 10:04:38 +

** Changed in: dpkg (Ubuntu Lucid)
   Status: In Progress = Fix Released

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-15 Thread Alessandro Ghersi
Same here, dpkg is very slow. I don't know if it's related to this bug,
maybe so, but I installed Lucid daily and it takes one hour to complete
the installation with quad core 3.2 Ghz on a fast hard disk.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-15 Thread Rogério Theodoro de Brito
Hi.

I am also seeing the bug that Nicolas just reported. Since my computer
is slower, the slowness is also magnified when used with the newer
version of dpkg.

If any further information is needed, please let me know.

Regards, Rogério Brito.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-15 Thread Jean-Baptiste Lallement
Thanks for testing, that's much appreciated.

Could you please provide the following information:
- Filesystem type (ext3/4, xfs, ...) 
- mount options
- Any specific configuration (lvm, raid, ...)
- hard drive specs
- If possible, an estimation of the slowdown (you'd better use the 'time' 
command instead of 'date')

Thanks in advance.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-15 Thread Nicolas DERIVE
for me, ext4, /dev/sda6 / ext4 rw,relatime,errors=remount-ro 0 0 (from mtab)
no lvm, no raid (a really classical installation, but with a separate /home)

Disk : average access time : 15,2ms, average reading speed : 66,2Mo/s
(tested with palimptest, no write data available because not empty)

Do you need any more info ?

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE
For all these packages, install time (without downloading) is 16sec with
old and 192sec with new dpkg. (will soon add files with start and end
time, and dpkg actions with these packages (using apt))

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE
for installing the -pae kernel with its headers, 23sec with old and
420sec with new dpkg... it's a dramatic slow down.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE

** Attachment added: list of packages for benchmark with old dpkg
   http://launchpadlibrarian.net/40880530/apt_old_dpkg_bench.txt

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE

** Attachment added: times of starting and ending with benchmark packages 
and old dpkg
   http://launchpadlibrarian.net/40880542/dates_old_dpkg_bench.txt

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE

** Attachment added: list of packages for benchmark with new dpkg
   http://launchpadlibrarian.net/40880572/apt_new_dpkg_bench.txt

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE

** Attachment added: times of starting and ending with benchmark packages 
and new dpkg
   http://launchpadlibrarian.net/40880576/dates_new_dpkg_bench.txt

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE

** Attachment added: list of packages for kernel install with old dpkg
   http://launchpadlibrarian.net/40880605/apt_old_dpkg_kernel.txt

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE

** Attachment added: list of packages for kernel install with new dpkg
   http://launchpadlibrarian.net/40880626/apt_new_dpkg_kernel.txt

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE

** Attachment added: times of starting and ending with kernel install packages 
and old dpkg
   http://launchpadlibrarian.net/40880624/dates_old_dpkg_kernel.txt

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE

** Attachment added: times of starting and ending with kernel install packages 
and new dpkg
   http://launchpadlibrarian.net/40880634/dates_new_dpkg_kernel.txt

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-12 Thread Nicolas DERIVE
Many files, but you have the transparency !

My script was :

date -R  txtnewdpkg2.txt  apt-get -y -q install linux-image-generic-
pae linux-headers-generic-pae  actions_apt_dpkg_new2.txt  date -R 
txtnewdpkg2.txt

or

date -R  txtnewdpkg.txt  apt-get -y -q install texlive-latex-extra-
doc texlive-generic-recommended hello bsdgames 
actions_apt_dpkg_new.txt  date -R  txtnewdpkg.txt

for both dpkg versions. I renamed the files in order to have a more
understandable title.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-11 Thread Nicolas DERIVE

** Attachment added: Dependencies.txt
   http://launchpadlibrarian.net/40781298/Dependencies.txt

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-11 Thread Nicolas DERIVE
Take in account that these times are given on a intel core2quad @ 2,66
Ghz...

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-11 Thread Jean-Baptiste Lallement
Thanks.

That was expected because few fsync have been added to prevent data loss when 
the system crashes during an upgrade (bug 512096)
Are you able to compare the performances of the latest version of dpkg with the 
previous version?

** Changed in: dpkg (Ubuntu)
   Status: New = Confirmed

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-11 Thread Nicolas DERIVE
not really, unless you give me a link to the previous version package
and a list of packages which could make a good benchmark. In that last
case I would be happy to help testing and comparing.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-11 Thread Nicolas DERIVE
I suppose in that case that trying reinstalling packages could make the
benchmark, and that it won't matter reinstall a package which the
previous dpkg package.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-11 Thread Nicolas DERIVE
I got the dpkg packages (thanks archive.u.com not delete previous
versions too fast !) but if you want a reliable benchmarking test I need
a list of packages to reinstall (maybe a kernel, kernel headers and
packages with triggers ? Seems to me they were the slowest ones). I'm
waiting for your advice on this. I will have quite some time tomorrow to
deal with this if you want.

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[Bug 537241] Re: My computer updates are very slow since latest dpkg update

2010-03-11 Thread Jean-Baptiste Lallement
I use to play with the texlive package. They are non critical, and some of them 
are shipping a large number of files.
texlive-latex-extra-doc (+8k files)
texlive-generic-recommended (~ 300 files and install-info and tex-common 
triggers )
hello or bsdgames are rather small but good for testing purpose.

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