Re: FW: File sizes -- how do we get them?

[Luis Bernardo <bernardo@math.lbl.gov>]

We need to know the file sizes for a couple of reasons. The one that concerns
me at the moment is the following: since we will use ftp (at least initially)
to transfer files from HPSS to the "local" cache, we thought that the easiest
to check that the transference was successful would be to look at the file
size of the transfered file. That means that we have those sizes stored in
a table (maybe not the best option if we have thousands of files and we keep
adding new files) or maybe we can get them through Objectivity. Hence 
Henrik's question.
	If we had a HPSS client API in the system (enterprise?) we are going
to use, then I could use that to get the file sizes, but apparently that's
not going to be the case. The other option I considered would be to issue
a remote call through ssh to HPSS that would return the size of the file
that one wants to transfer.

Luis

--------------------------------------------------------------
Luis M. Bernardo  <lmbernardo@lbl.gov> <www.lbl.gov/~bernardo>  
Scientific Data Management Research & Development Group
Lawrence Berkeley National Laboratory         
Berkeley, CA 94720 
 

On Thu, 26 Mar 1998, Mark Pollack wrote:

> 
> 
> -----Original Message-----
> From:	Mark Pollack [SMTP:markp@bnl.gov]
> Sent:	Thursday, March 26, 1998 2:08 PM
> To:	'Henrik Nordberg'
> Subject:	RE: File sizes -- how do we get them?
> 
> Dear Henrik,
> 
> My guess would be that we will know in advance where 
> all the files will be located and can just ask through normal
> system calls the size of all the files.  Something like the
> statfs. 
> 
> Only since I was looking into the OSE class library in detail
> they have a File System class that lets you get this information.
> The advantage might be that it works on both win32 and unix.
> http://www.dscpl.com.au/ose-5.2/lib_161.htm#HEADING161-0
> I'm sure there are others like this.
> 
> Regards,
> - Mark
> 
> 
> 
> -----Original Message-----
> From:	Henrik Nordberg [SMTP:henrikn@math.lbl.gov]
> Sent:	Wednesday, March 25, 1998 2:40 PM
> To:	challenge@sseos.lbl.gov
> Subject:	File sizes -- how do we get them?
> 
> Dear Challenged,
> 
> For a couple of reasons the Storage Manager should know the size of the
> files (i.e., the Objectivity databases). 
> Do you know an easy way of getting them? 
> Are they stored in the Tag DB?
> Can you get them through an Objectivity interface (even when they are on
> HPSS)?
> Any other ways?
> 
> Thanks, - Henrik
> ___________________________________________________________
> Henrik Nordberg <HNordberg@lbl.gov> http://nordberg.lbl.gov
> Scientific Data Management Research & Development Group
> Lawrence Berkeley Laboratory
> 
>