0000276: Investigate archival storage extension

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Severity

Reproducibility

Date Submitted

Last Update

0000276

[TMS]

minor

always

29-06-10 09:04

07-03-11 13:22

Reporter

Arno Schoenmakers

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public

Assigned To

Priority

normal

Resolution

fixed

Status

closed

Summary

0000276: Investigate archival storage extension

Description

Suggest new hardware for archive.

See below for additional info.

A.

Additional Information

Hi Josh and Arno,

Adding it all up:

Data production per half year: 1.8 TB

Extra for 2nd 10B: 0.9 TB

                                                    ------

total 2.7 TB

which is more tham the available 1.9 TB

So, we need another bit of storage.

Arno, can you make a spec of what we need?

Kind regards,

        Harm

>>> Gyula Jozsa <jozsa@astron.nl> 6/28/2010 2:57 PM >>>
Hi all,

I did not go through all proposals, since they are mostly standard ones, using the capacity equivalent of 1024 channel line observations with an integration time of 60s. There is one project, though, R10B/010, for which I calculate the following:

Setup: 1024-channel 2 pol line observation plus 6x64 4 polarisation continuum bands, integration time 10s

Since a usual (1-minute integration time) observation needs 1800 Mbyte/12h and I calculate at the moment 574 h total observing time, I get to

60s/10s * 1800 MByte*(1024+6*128)/1024 channels /12 hours*574 hours Mbyte = 900 000 MByte disk space for this project alone.

Cheers,
Josh

Arno Schoenmakers wrote:

WSRT archive diskspace usage since 2006 (Gbyte unless denoted differently):



2006: 517 + 650 + 650 + 650 + 650 + 450 = 3.6 Tbyte
2007: 214 + 650 + 650 + 650 + 650 + 527 = 3.3 Tbyte
2008: 158 + 650 + 650 + 333 = 1.8 Tbyte
2009: 340 + 650 + 650 + 650 + 33 = 2.3 Tbyte
2010: 620 + 650 + 18 = 1.3 Tbyte (up to 28-6-2010)



Still Available: 650 + 650 + 600 = 1.9 Tbyte



Should be just enough for this year. There is an additional 650 Gbyte partition but that is also used for system backups and such.



   Arno

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Notes
(0000293) Arno Schoenmakers 08-07-10 07:22	Delegated to Teun; he will come up with suggestions. Note: Old archive must be transferred to new archive.

Issue History
Date Modified	Username	Field	Change
29-06-10 09:04	Arno Schoenmakers	New Issue
08-07-10 07:22	Arno Schoenmakers	Note Added: 0000293
08-07-10 07:22	Arno Schoenmakers	Status	new => progressing
07-03-11 13:22	Arno Schoenmakers	Status	progressing => closed
07-03-11 13:22	Arno Schoenmakers	Resolution	open => fixed