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Re: Java DB rotation

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On 1/30/2012 9:12 PM, Arne Vajhøj wrote:
> On 1/30/2012 9:08 PM, Jim Lee wrote:
>> I have a Java server controller that read/write to Database table
>>
>> Java server will start read / write to a new DB table every
>> week/monday
>> e.g.
>> table-1-2-2012
>> table-1-9-2012
>> table-1-16-2012
>> table-1-23-2012 ... etc
>>
>> I think of 2 ways to do the DB table rotation
>>
>> 1) check the server timestamp, if today's date is week of 1-23-2012,
>> then read/write to table-1-23-
>>
>> 2012
>>
>> 2) have a unix corn job run every monday to generate a text file on
>> Java server with DB table named on
>>
>> that date - on each Java request, check the text file's table name -
>> then read/write to that DB table
>>
>> any other solution to DB table rotation?
>>
>> the first way check timestamp have a drawback when server's time is
>> not set to correct time, since
>>
>> there are many Java server running for load balance, it's not a good
>> idea.
>>
>> the second way is a better solution, but request additional setup -
>> cron job
>
> I can not see any any problems with construction the table
> name every time you need it.
>
> That string formatting will be insignificant compared to
> the actual database operation.
>
> And it will be far more expensive to read from a file.
>
> So definitely #1.

But also consider if you really want to switch table like
that.

Why not just use the same table all the time with a column
for the period?

For most cases that would be the best solution. Exceptions
do exist.

Arne

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Thread

Java DB rotation Jim Lee <jimlee2907@yahoo.com> - 2012-01-30 18:08 -0800
  Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-30 21:12 -0500
    Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-30 21:14 -0500
      Re: Java DB rotation Jim Lee <jimlee2907@yahoo.com> - 2012-01-30 18:20 -0800
        Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-30 21:34 -0500
        Re: Java DB rotation Robert Klemme <shortcutter@googlemail.com> - 2012-01-31 08:36 +0100
    Re: Java DB rotation Jim Lee <jimlee2907@yahoo.com> - 2012-01-30 18:17 -0800
      Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-30 21:20 -0500
        Re: Java DB rotation Jim Lee <jimlee2907@yahoo.com> - 2012-01-30 18:23 -0800
          Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-30 21:31 -0500
  Re: Java DB rotation Martin Gregorie <martin@address-in-sig.invalid> - 2012-01-31 02:21 +0000
    Re: Java DB rotation Jim Lee <jimlee2907@yahoo.com> - 2012-01-30 18:24 -0800
      Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-30 21:32 -0500
        Re: Java DB rotation Robert Klemme <shortcutter@googlemail.com> - 2012-01-31 08:38 +0100
          Re: Java DB rotation Chris Riesbeck <Chris.Riesbeck@gmail.com> - 2012-01-31 12:57 -0600
            Re: Java DB rotation Chris Riesbeck <Chris.Riesbeck@gmail.com> - 2012-01-31 13:03 -0600
              Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-31 20:32 -0500
                Re: Java DB rotation Chris Riesbeck <Chris.Riesbeck@gmail.com> - 2012-02-01 13:49 -0600
                Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-02-01 19:23 -0500
            Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-31 20:31 -0500
          Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-31 20:30 -0500
  Re: Java DB rotation Arne Vajhøj <arne@vajhoej.dk> - 2012-01-30 21:35 -0500
    Re: Java DB rotation Lew <noone@lewscanon.com> - 2012-01-30 22:54 -0800
  Re: Java DB rotation George Neuner <gneuner2@comcast.net> - 2012-02-02 14:05 -0500
  Re: Java DB rotation Rajiv Gupta <rajiv@invalid.com> - 2012-02-08 02:08 +1100

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