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VAST Repositories > 2 GB on Linux

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Hermann Ottens

VAST Repositories > 2 GB on Linux

Hi group,

does anybody have any experiences with using large repositories on a Linux server?
We're currently using emsrv on Windows. Repository size is around 8 GB.
Now we're trying to move our repository to Linux, but every time i try to connect to our repository the client keeps on telling me:
"...
1) error accessing <repository filename>. OS error 75
2) UndefinedObject dnu isOpen
..."
If i try to connect to another repository of only ~800 MB size, everything is fine.
Our Linux Server is a 64-bit machine running SLES 11, file system is ext3 with block size 1024 byte (=> file size limit = 16 GB).
The error occurs regardless of the type of access (tried Windows client via network, Linux client via network, Linux client local file I/O).
Setting OpenReadOnly=true in the abt.ini doesn't change the behaviour, error still occurs.
File access should be possible (rwxrwxrwx set).
So i think it's a server problem.
Any ideas?

Cheers,
Hermann

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John O'Keefe-3

Re: VAST Repositories > 2 GB on Linux

Hermann -
EMSRV on Linux uses the ext2 file system (which supports only 2GB).

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Hermann Ottens

Re: VAST Repositories > 2 GB on Linux

Hi John,

thank you four your answer. (After your hint i actually found it in the documentation, so it's my fault.)
Do you have any information about whether this is going to be changed?

Hermann

Am Mittwoch, 29. Februar 2012 18:27:07 UTC+1 schrieb John O'Keefe:

Hermann -
EMSRV on Linux uses the ext2 file system (which supports only 2GB).

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jtuchel

Re: VAST Repositories > 2 GB on Linux

In reply to this post by John O'Keefe-3

Hi John,

Linux distros move on to newer file systems, ext4 or mid-term btrfs.

So I guess it's a good idea to look for omplementation options that are independent of the filesystem...

Joachim

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SebastianHC

Re: VAST Repositories > 2 GB on Linux

In reply to this post by Hermann Ottens

Hi Hermann,

8GB is very large. Do you really need every single method edition in it?

I clone my manager.dats after every VAST major release.
Cloning a manager.dat (building a new one) get rid of never ever unreleased/unversioned code.

This should shrink your manager.dat quite much.

Cheers,
Sebastian

jtuchel

Re: VAST Repositories > 2 GB on Linux

IHi Sebastian,

that's what my first thought was as well: 8 gb sounds like a whole lotta stuff, and maybe much more than just Smalltalk code. So if that's all Code, then I guess cloning / compressing will reduce it down to less than a gig or so (just an estimation).

But what if

* A porject wants to keep all code editions ?

* envy keeps stuff in user fields ?

Compressing is not an option or doesn't help much in these scenarios.

And I think Instantiations should prepare for the day when Linux distros don't ship with ext2fs any more. Sure, it will be available as downloadable package for quite a while, but it will eventually be unsupported on commercially supported distros in a year or maybe three. So it sure is worth looking into how hard a requirement ext2fs is for emsrv. If it's full of API specific to a certain file system, this can be hard. But since emsrv runs on many platforms, I guess that's not the case. It's probably more a question of testing and support, which also is not an easy question.

Joachim