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From Rob Weir <>
Subject Re: Sourceforge and AOO 3.4 distribution
Date Tue, 20 Mar 2012 19:45:01 GMT
On Tue, Mar 20, 2012 at 3:22 PM, Joe Schaefer <> wrote:
> We're still exploring available options and collecting
> data imacat.  Right now an existing ooo mirror operator
> has reported to us that his average bandwidth consumption
> for ooo was ~100Mbps.  It would help us to know how many
> mirrors support the existing mirrorbrain service for ooo
> to get a guess as to what the impact would be for Apache
> mirrors, but we are anticipating similar bandwidth requirements
> for our mirrors given the available data.
> What we currently need are estimates related to peak downloads
> during the initial few days / weeks of a release.  Anyone
> with historical data on this needs to step forward and share
> it ASAP- 300K strikes me as an off-peak figure at this point.

I have not seen any actual log files with this info, but there are
reported tidbits that might be useful, such as:

" 3.0 was downloaded 3 million times in its first week,
with about 80% of the downloads by Windows users, an official with the
group said in a blog post on Monday."

So per day that is 430,000, around 50% much more than the average we
saw in February.  Not as much as I expected.

What I don't know is when they enabled the update notifications
feature then, if it even existed in 3.0.  I think that will have a big
impact on download peaks.  In fact, we might even want to be clever,
like have a CGI that sometimes says there is an update available, and
sometimes does not, just to spread out the load more evenly.  For
example, if we have our server respond "you have the latest" 90% of
the time, then it will take several requests on average for the
auto-update feature to prompt the user to download the update.  So we
have some ability to throttle that demand, based on our CGI.


> ----- Original Message -----
>> From: imacat <>
>> To: Apache OpenOffice Developers <>
>> Cc:
>> Sent: Tuesday, March 20, 2012 3:14 PM
>> Subject: Re: Sourceforge and AOO 3.4 distribution
>>     Please correct me if I'm wrong.  But I thought that the Apache
>> mirrors have more bandwidth than the SourceForge mirrors.  Could someone
>> explain why do we put the default download to places with less bandwidth?
>> Apache mirrors:
>> SourceForge mirrors:
>> On 2012/03/21 03:07, Dave Fisher said:
>>>  On Mar 20, 2012, at 11:33 AM, Joe Schaefer wrote:
>>>>>  ________________________________
>>>>>  From: Mark Ramm <>
>>>>>  To:; Joe Schaefer
>> <>
>>>>>  Cc: Ross Gardler <>
>>>>>  Sent: Tuesday, March 20, 2012 2:25 PM
>>>>>  Subject: Re: Sourceforge and AOO 3.4 distribution
>>>>>  On Mon, Mar 19, 2012 at 4:04 PM, Joe Schaefer
>> <> wrote:
>>>>>>  FWIW the ballpark figures we have today Roberto
>>>>>>  are roughly 12GB worth of release artifacts and
>>>>>>  about100TB / day worth of download traffic.
>>>>>  Thanks for the information.
>>>>>  I'm working with Roberto to make sure all the right technical
>>>>>  resources are aligned behind him, and that we have the resources to
>>>>>  provide a great experience to your users. So, I'm here to help
>> out,
>>>>>  and validate everything to make sure we are prepared to handle
>> AOO's
>>>>>  peak load.
>>>>>  Based on the file size data in the previous e-mail, and this
>> bandwidth
>>>>>  information, I believe we are talking about something around 700k
>>>>>  download per day.
>>>>>  Is that peak load, or is that sustained load? If it's
>> sustained, do
>>>>>  you have any ideas about what peak load would look like?  If not,
>> do
>>>>>  you have any ideas about what sustained load would look like?
>>>>  Up until the Update service broke last week, ooo was sustaining 300K
>>>>  downloads a day. We used a ballpark download figure of 300 MB per user,
>>>>  which may explain the discrepancy if you used something considerably
>> less.
>>>>  We simply don't have any data at this point about peak load to make
>>>>  any educated guesses.
>>>  When this subject came up last year Marcus described peak as 300,000
>> downloads / day.
>>>  Stats were collected until last February's switch to Kenai. See
>>>  Depending on how we handle the announcement of AOO 3.4 - press, update
>> service, and ooo-announce we might be able to spread a single spike into more
>> smaller peaks.
>>>  HTH,
>>>  Dave
>>>>>  And finally: would you have any objection to us using a mix of
>> fixed
>>>>>  mirrors, elastic file delivery services (like s3), and commercial
>> CDN
>>>>>  service to handle spikes in download gracefully and assure that
>> global
>>>>>  users get good download performance when local mirrors are
>> overloaded
>>>>>  or not available?
>>>>  No, we may even be willing to budget some amount for this purpose.
>>>>  Cost estimates would be appreciated as our budget numbers for FY2012
>>>>  need to be finalized next week.
>>>>>  I'm looking forward to working with all of you to make sure
>> that users
>>>>>  have a reliable and fast download source for the upcoming Apache
>> Open
>>>>>  Office release.   Let me know if there's any questions I can
>> answer
>>>>>  for you, or anything else I can do to help.
>>>>>  --Mark Ramm
>>>>>  ====
>>>>>  This e- mail message is intended only for the named recipient(s)
>> above. It may contain confidential and privileged information. If you are not
>> the intended recipient you are hereby notified that any dissemination,
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>> --
>> Best regards,
>> imacat ^_*' <>
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