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Accumulo >> mail # user >> Changing Time on Server


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Ott, Charles H. 2013-07-26, 03:03
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Eric Newton 2013-07-26, 12:42
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Ott, Charles H. 2013-07-26, 14:36
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Re: Changing Time on Server
Yes, I think that will work.
On Fri, Jul 26, 2013 at 10:36 AM, Ott, Charles H. <[EMAIL PROTECTED]>wrote:

> Do you think this bash script would be okay to run on a server with
> zookeeper?  It is designed to increment the system clock by 1 second every
> 10 seconds for 960 loops (16 minutes)****
>
> ** **
>
> *#! /usr/bin/env bash*
>
> * *
>
> *#Increase server time by 960 seconds(16mins) over a 9600
> second(2hrs40mins) period.*
>
> * *
>
> *for i in {1..960}*
>
> *do*
>
> *later=$(date --date="+1 second")*
>
> *date -s "$later"*
>
> *sleep 10*
>
> *done*
>
> ** **
>
> Thanks,****
>
> Charles****
>
> ** **
>
> *From:* [EMAIL PROTECTED][mailto:
> [EMAIL PROTECTED]] *On Behalf
> Of *Eric Newton
> *Sent:* Friday, July 26, 2013 8:43 AM
> *To:* [EMAIL PROTECTED]
> *Subject:* Re: Changing Time on Server****
>
> ** **
>
> Yes, yanking the time around by more than the zookeeper timeout can cause
> havoc, since the system cannot reason about session guarantees.  But moving
> the time around by a few seconds should be fine.****
>
> ** **
>
> The changes for ACCUMULO-1572 might help.****
>
> ** **
>
> -Eric****
>
> ** **
>
> ** **
>
> On Thu, Jul 25, 2013 at 11:03 PM, Ott, Charles H. <[EMAIL PROTECTED]>
> wrote:****
>
> I know this question may be a bit off topic for Accumulo, but I am curious
> about Zookeeper and changing server time.  Is it possible to correct the
> clock on a server without zookeeper/hadoop/accumulo combination breaking on
> a development VM with all three services running?  Last time I tried to do
> it, I believe zookeeper wasnt able to track sessions properly, and
> everything failed to communicate.****
>
> ** **
>
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Ott, Charles H. 2013-07-29, 15:26