Re: [opensuse] compression tool with high compression ratio, multiple files and fast random access?
Just in case anyone was following this thread - I asked this question back in august or september - at the time I settled on using plain old zip, because it was the fastest when it came to extraction. However, I have just recently come across 'cromfs' which I don't think was mentioned back then. cromfs is exactly what I was looking for - high compression ratio, fast random access. It also works fine with automount, which became a requirement (as it is a file system). The only slight drawback is that it, at the moment, requires one instance per filesystem mounted, which in my case makes for a lot of processes. -- Per Jessen, Zürich (7.1°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sunday, 2010-10-24 at 10:11 +0200, Per Jessen wrote:
Just in case anyone was following this thread - I asked this question back in august or september - at the time I settled on using plain old zip, because it was the fastest when it came to extraction. However, I have just recently come across 'cromfs' which I don't think was mentioned back then. cromfs is exactly what I was looking for - high compression ratio, fast random access. It also works fine with automount, which became a requirement (as it is a file system). The only slight drawback is that it, at the moment, requires one instance per filesystem mounted, which in my case makes for a lot of processes.
It is read only - which for me is a roadblock. http://en.wikipedia.org/wiki/List_of_file_systems # Cromfs is a user-space (FUSE based) read-only filesystem using an efficient LZMA compression algorithm. - -- Cheers, Carlos E. R. (from 11.2 x86_64 "Emerald" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) iEYEARECAAYFAkzEGbsACgkQtTMYHG2NR9XduwCeLSrdJxhIKX7loiC/YvOsOBO+ oJkAoJOrRg8vqz5hJtgSoh4c1wCYDCTl =LJtC -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Carlos E. R. wrote:
On Sunday, 2010-10-24 at 10:11 +0200, Per Jessen wrote:
Just in case anyone was following this thread - I asked this question back in august or september - at the time I settled on using plain old zip, because it was the fastest when it came to extraction. However, I have just recently come across 'cromfs' which I don't think was mentioned back then. cromfs is exactly what I was looking for - high compression ratio, fast random access. It also works fine with automount, which became a requirement (as it is a file system). The only slight drawback is that it, at the moment, requires one instance per filesystem mounted, which in my case makes for a lot of processes.
It is read only - which for me is a roadblock.
Forgot to mention that - that is an important feature to me. -- Per Jessen, Zürich (8.4°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Per Jessen wrote:
Carlos E. R. wrote:
On Sunday, 2010-10-24 at 10:11 +0200, Per Jessen wrote:
Just in case anyone was following this thread - I asked this question back in august or september - at the time I settled on using plain old zip, because it was the fastest when it came to extraction. However, I have just recently come across 'cromfs' which I don't think was mentioned back then. cromfs is exactly what I was looking for - high compression ratio, fast random access. It also works fine with automount, which became a requirement (as it is a file system). The only slight drawback is that it, at the moment, requires one instance per filesystem mounted, which in my case makes for a lot of processes.
It is read only - which for me is a roadblock.
Forgot to mention that - that is an important feature to me.
Actually, not really very important, my compressed archives are read-only anyway. -- Per Jessen, Zürich (8.3°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2010-10-24 14:59, Per Jessen wrote:
Per Jessen wrote:
Actually, not really very important, my compressed archives are read-only anyway.
Eventually. But one must write to them at some point. I would like to use a R/W compressed filesystem for the long term storage of mail. The MUAs I use fail if the partition is RO. For storage on DVDs, I use zisofs. - -- Cheers / Saludos, Carlos E. R. (from 11.2 x86_64 "Emerald" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org/ iEYEARECAAYFAkzEL44ACgkQtTMYHG2NR9UKOwCfZRK/JyGEuz65eE2JE9Ibg4Ty 3mcAnA5+2RrOCxKPvFaX/QmP8LHy3Efd =nWu0 -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Carlos E. R. wrote:
On 2010-10-24 14:59, Per Jessen wrote:
Per Jessen wrote:
Actually, not really very important, my compressed archives are read-only anyway.
Eventually. But one must write to them at some point.
Well, yes - to create a cromfs filesystem, you use mkcromfs.
I would like to use a R/W compressed filesystem for the long term storage of mail. The MUAs I use fail if the partition is RO.
I'm using cromfs for exactly that purpose - long-term archival of email. -- Per Jessen, Zürich (7.3°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sunday, 2010-10-24 at 18:00 +0200, Per Jessen wrote:
Carlos E. R. wrote:
Eventually. But one must write to them at some point.
Well, yes - to create a cromfs filesystem, you use mkcromfs.
I see. What rpm contains it? Webpin returns blank.
I would like to use a R/W compressed filesystem for the long term storage of mail. The MUAs I use fail if the partition is RO.
I'm using cromfs for exactly that purpose - long-term archival of email.
I tried this previously, but Thunderbird refused to open mailboxes in the CD, because it could not update the indexes. I could try unionfs... - -- Cheers, Carlos E. R. (from 11.2 x86_64 "Emerald" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) iEYEARECAAYFAkzEuhoACgkQtTMYHG2NR9WdGACgjyGdniVIy49e4iQ8YcDLC0xn E7IAn0BQI83lrPiNVkd+bXInosVQIPIS =IKpO -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On 10/24/2010 05:58 PM, Carlos E. R. wrote:
I see. What rpm contains it? Webpin returns blank.
Webpin is STILL broken for 11.3. I just tried searching 'fluxbox' again, (it is in windowmanagers), but alas, it looks like the buildservice isn't done yet :-( -- David C. Rankin, J.D.,P.E. Rankin Law Firm, PLLC 510 Ochiltree Street Nacogdoches, Texas 75961 Telephone: (936) 715-9333 Facsimile: (936) 715-9339 www.rankinlawfirm.com -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Carlos E. R. wrote:
On Sunday, 2010-10-24 at 18:00 +0200, Per Jessen wrote:
Carlos E. R. wrote:
Eventually. But one must write to them at some point.
Well, yes - to create a cromfs filesystem, you use mkcromfs.
I see. What rpm contains it? Webpin returns blank.
I don't know, I'm building it from source, but I would assume the cromfs package? I think I saw it mentioned in build service when I googled at some point. There are basically three tools for cromfs - mkcromfs, unmkcromfs (which is really an extraction tool) and cvcromfs for converting between different versions.
I would like to use a R/W compressed filesystem for the long term storage of mail. The MUAs I use fail if the partition is RO.
I'm using cromfs for exactly that purpose - long-term archival of email.
I tried this previously, but Thunderbird refused to open mailboxes in the CD, because it could not update the indexes.
Hmm, I can imagine that would be a problem. I'm using dovecot to serve the archives, and in dovecot I'm pointing the indexes to a writable filesystem. -- Per Jessen, Zürich (4.9°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday, 2010-10-25 at 08:20 +0200, Per Jessen wrote:
Carlos E. R. wrote:
I see. What rpm contains it? Webpin returns blank.
I don't know, I'm building it from source, but I would assume the cromfs package? I think I saw it mentioned in build service when I googled at some point. There are basically three tools for cromfs - mkcromfs, unmkcromfs (which is really an extraction tool) and cvcromfs for converting between different versions.
Mmmm... I would prefer a mainstream rpm. I found it on "home:/cboltz:/cromfs".
I tried this previously, but Thunderbird refused to open mailboxes in the CD, because it could not update the indexes.
Hmm, I can imagine that would be a problem. I'm using dovecot to serve the archives, and in dovecot I'm pointing the indexes to a writable filesystem.
Ah, I see, you use a trick. - -- Cheers, Carlos E. R. (from 11.2 x86_64 "Emerald" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (GNU/Linux) iEYEARECAAYFAkzFZG0ACgkQtTMYHG2NR9W/kQCdGuJ91/LlHW1wMulfndFXHu7f zVIAn0Zho9sPlyvQIRF7nrmJbn+93gSF =kDjo -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (3)
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Carlos E. R. -
David C. Rankin -
Per Jessen