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operations:documentation.ivs.mark5_module_selection

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Choosing the right module for the experiment

If possible, please try to record an entire experiment onto a single module. If it won't fit, please contact observatory staff - they will usually be able to put a module with enough space into the Mark 5.

First, check to see how much data will be recorded, then check to see which modules are mounted in the Mark5, then choose one that is big enough. Here's how to do it:

Data requirement

At the end of the printed schedule summary is an estimate of the total amount of data that will be recorded for the experiment. For example, this experiment requires a tad under 1.4 TB:

 .
 .
 .
 203-1636b 6722 3C446     59 72 NEUTR  16:36:38  16:38:33    1:55  1354.0    *    
 203-1641  6739 0059+581  25  5 NEUTR  16:41:55  16:44:08    2:13  1357.7    *    
 203-1647  6756 1749+096 290 29 NEUTR  16:47:10  16:48:11    1:01  1362.0    *    
 203-1649  6773 0332-403 129 10 CCW    16:49:54  16:51:03    1:09  1363.9    *    
 203-1654  6790 1954-388 219 56 CCW    16:54:53  16:57:37    2:44  1366.1    *    

   Total  1371.4 Gbytes
   Total number of scans:   400

Module capacity checks

Typing mk5=bank_set? into eRemoteCtrl will return the VSNs of the modules currently loaded and their capacities in GB where the syntax is [Bank] [label]/[capacity]/[block size]. Here's an example output:

2014.198.18:30:05.89/mk5/!bank_set? 0 : A : USN-0087/2000/1024 : B : HOB+0051/6000/1024 ; 

So in this case Bank A is active (as it's listed first), it's label is USN-0087 and it has a capacity of 2000 GB. Bank B has HOB+0051 loaded and it's a 6000 GB module.

If the module that is in Mark5 already has some data on it, the amount of free space available can be seen in e-Remote Ctrl window “M5 Capacity” box above the pie diagram.

So which module should I use?

As a rule of thumb, the experiment should go on the smallest module it will fit on available in the Mark 5.

Doubling up

All R4, CRDS and CRF experiments from Katherine and Yarragadee need to be directly shipped to Washington, so please avoid putting them on a module with another experiment.

Everything else needs to be shipped to Hobart for e-transfer to the correlator. Therefore, two experiments, if they fit, can go on the same module. However, R1's do need to get to Hobart ASAP. Often there will be an R1 straight after another experiment. They can go on the same module, providing the R1 is the LAST experiment to be recorded to it (and there is enough disk space!).

So for example, if there has been an Austral and there is still 3TB left on the module, and the R1 will use 2.5TB, put them on the same module.

/home/www/auscope/opswiki/data/attic/operations/documentation.ivs.mark5_module_selection.1406026356.txt.gz · Last modified: 2014/07/22 10:52 by liza