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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Qian Yingjin via lustre-devel Reply-To: Qian Yingjin Content-Type: multipart/mixed; boundary="===============4193464480769351566==" Errors-To: lustre-devel-bounces@lists.lustre.org Sender: "lustre-devel" --===============4193464480769351566== Content-Language: zh-CN Content-Type: multipart/alternative; boundary="_000_DM6PR19MB2923E7B9F156200B099C4574CC629DM6PR19MB2923namp_" --_000_DM6PR19MB2923E7B9F156200B099C4574CC629DM6PR19MB2923namp_ Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 SGkgQXVyqKZsaWVuLA0KDQpUaGVyZSBpcyBhIHJvdWdoIHRob3VnaHQgYWJvdXQgaXQ6IGh0dHBz Oi8vamlyYS53aGFtY2xvdWQuY29tL2Jyb3dzZS9MVS0xMzAyNA0KTHVzdHJlIEhTTSBzdXBwb3J0 IGZvciBhIGRpcmVjdG9yeQ0KDQpSZWdhcmRzLA0KUWlhbg0KDQpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXw0Kt6K8/sjLOiBsdXN0cmUtZGV2ZWwgPGx1c3RyZS1kZXZlbC1ib3VuY2Vz QGxpc3RzLmx1c3RyZS5vcmc+ILT6se0gRGVncmVtb250LCBBdXJlbGllbiB2aWEgbHVzdHJlLWRl dmVsIDxsdXN0cmUtZGV2ZWxAbGlzdHMubHVzdHJlLm9yZz4NCreiy83KsbzkOiAyMDIxxOoxMdTC MjXI1SAxODoxOA0KytW8/sjLOiBsdXN0cmUtZGV2ZWxAbGlzdHMubHVzdHJlLm9yZyA8bHVzdHJl LWRldmVsQGxpc3RzLmx1c3RyZS5vcmc+DQrW98ziOiBbbHVzdHJlLWRldmVsXSBSZWNvbW1lbmRh dGlvbiBmb3IgaHNtX3Jlc3RvcmUgZm9yIGRpcmVjdG9yaWVzDQoNCkhlbGxvIGFsbA0KDQpJJ20g ZG9pbmcgc29tZSBlYXJseSB3b3JrIHRvd2FyZCBpbXBsZW1lbnRpbmcgYSBkaXJlY3RvcnkvbmFt ZXNwYWNlIHN1cHBvcnQgZm9yIEx1c3RyZS9IU00uIFRoZSBpZGVhIHdvdWxkIGJlIHRvIHN1cHBv cnQgc29tZXRoaW5nIHNpbWlsYXIgdG8gaHNtX3Jlc3RvcmUvaHNtX3JlbGVhc2UgYnV0IGZvciBk aXJlY3Rvcmllcy4NCg0KTXkgZmlyc3QgdGhvdWdodCB3YXMgZm9yIHRoZSBNRFQgdG8gbm90IGdy YW50IExETE0gbG9jayBmb3IgdGhpcyBkaXJlY3RvcnkgYW5kIGhvbGQgaXQsIHdoaWxlIHRoZSBk aXJlY3RvcnkgaXMgZ2V0dGluZyByZXN0b3JlZCBieSBjb3B5dG9vbCwgaW4gYSBzaW1pbGFyIGZh c2hpb24gdGhhbiB3aGF0IGlzIGRvbmUgZm9yIGZpbGVzLiBCdXQgdGhlIGhhcmQgcGFydCBoZXJl LCBpcyB0byBoYXZlIGEgd2F5IGZvciBjb3B5dG9vbCB0byBhY2Nlc3MgdGhlIGRpcmVjdG9yeSB3 aGlsZSBpdHMgYWNjZXNzIGlzIGFjdHVhbGx5IHByZXZlbnRlZCBieSB0aGUgYWJvdmUgbG9ja2lu Zy4NClJlc3RvcmluZyBhIGZpbGUgaXMgdXNpbmcgdGhpcyBzbWFydCB0cmljayBvZiByZXN0b3Jp bmcgaXQgaW4gYSBkaWZmZXJlbnQgdGVtcG9yYXJ5IGZpbGUgYW5kIHVzaW5nIGxheW91dCBzd2Fw IGF0IHRoZSBlbmQgdG8gbW92ZSBkYXRhIHRvIHRoZSBhY3R1YWwgcmVhbCBmaWxlLiBJdCBsb29r cyBkaWZmaWN1bHQgdG8gZG8gdGhlIHNhbWUgdGhpbmcgaGVyZS4NCg0KRG8geW91IGhhdmUgYW55 IHJlY29tbWVuZGF0aW9uIG9uIHRoZSByaWdodCB3YXkgdG8gZnJhbWUgdGhpcyBkaXJlY3Rvcnkg YWNjZXNzIGZvciBjb3B5dG9vbHM/DQoNCkF1cqimbGllbg0KDQoNCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fDQpsdXN0cmUtZGV2ZWwgbWFpbGluZyBsaXN0 DQpsdXN0cmUtZGV2ZWxAbGlzdHMubHVzdHJlLm9yZw0KaHR0cDovL2xpc3RzLmx1c3RyZS5vcmcv bGlzdGluZm8uY2dpL2x1c3RyZS1kZXZlbC1sdXN0cmUub3JnDQo= --_000_DM6PR19MB2923E7B9F156200B099C4574CC629DM6PR19MB2923namp_ Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: quoted-printable
Hi Aur=A8=A6lien,
<= br>
T= here is a rough thought about it: https://jira.whamcloud.com/browse/LU-1302= 4
Lustre HSM support for a directory

Regards,
Qian

=B7=A2=BC=FE=C8=CB: lustre-= devel <lustre-devel-bounces@lists.lustre.org> =B4=FA=B1=ED Degremont,= Aurelien via lustre-devel <lustre-devel@lists.lustre.org>
=B7=A2=CB=CD=CA=B1=BC=E4: 2021=C4=EA11=D4=C225=C8=D5 18:18
=CA=D5=BC=FE=C8=CB: lustre-devel@lists.lustre.org <lustre-devel@l= ists.lustre.org>
=D6=F7=CC=E2: [lustre-devel] Recommendation for hsm_restore for dire= ctories
 
Hello all

I'm doing some early work toward implementing a directory/namespace support= for Lustre/HSM. The idea would be to support something similar to hsm_rest= ore/hsm_release but for directories.

My first thought was for the MDT to not grant LDLM lock for this directory = and hold it, while the directory is getting restored by copytool, in a simi= lar fashion than what is done for files. But the hard part here, is to have= a way for copytool to access the directory while its access is actually prevented by the above locking.
Restoring a file is using this smart trick of restoring it in a different t= emporary file and using layout swap at the end to move data to the actual r= eal file. It looks difficult to do the same thing here.

Do you have any recommendation on the right way to frame this directory acc= ess for copytools?

Aur=A8=A6lien


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