blocks|key|697704|text|ZFS使用了一个名为热休克蛋白(混合存储池)的存储层：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|697705|图层:内存|ordered-list-item|697706|层:基于SSD的读缓存(L2ARC)和写缓存(单独的意向日志，也就是slog).|697707|层：(便宜)硬盘|697708|与仅使用硬盘的解决方案相比，与HSP相比，它更容易自动受益于SSD的优点。使用HSP的系统可以比后者更快、更便宜。有关一些不错的示例和更多细节，请参见此链接。|697709|我认为有关于ZFS的层次存储管理(HSM)+(例如阿霉素(自动数据迁移)+OpenSolaris项目)的计划，但我不知道它的当前状态。|entityMap|0|LINK|mutability|MUTABLE|url|https://blogs.oracle.com/ahl/entry/fishworks_launch|1|https://blogs.oracle.com/brendan/entry/slog_screenshots|2|http://en.wikipedia.org/wiki/Hierarchical_storage_management|3|http://opensolaris.org/os/project/adm/^0|A|C|0|0|0|0|0|23|3|1|0|A|B|2|P|B|3^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|D|3|E|5|F|7|15|8|@]|9|@]|C|$]]|$1|G|3|H|5|F|7|16|8|@]|9|@]|C|$]]|$1|I|3|J|5|F|7|17|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|18|8|@]|9|@$A|19|B|1A|1|1B]]|C|$]]|$1|M|3|N|5|6|7|1C|8|@]|9|@$A|1D|B|1E|1|1F]|$A|1G|B|1H|1|1I]]|C|$]]]|O|$P|$5|Q|R|S|C|$T|U]]|V|$5|Q|R|S|C|$T|W]]|X|$5|Q|R|S|C|$T|Y]]|Z|$5|Q|R|S|C|$T|10]]]]

Well, ZFS uses a storage layering called <a href="https://blogs.oracle.com/ahl/entry/fishworks_launch" rel="noreferrer">Hybrid Storage Pool (HSP)</a>:

<ol>
<li>Layer: memory</li>
<li>Layer: SSD-based read-caches (L2ARC) and write-caches (separate intent log aka slog).</li>
<li>Layer: (cheap) harddisks</li>
</ol>

With HSP its easy to automatically benefit from the advantages of SSDs compared to a harddisk-only solution. A system using HSP can be both faster and cheaper than the latter. See <a href="https://blogs.oracle.com/brendan/entry/slog_screenshots" rel="noreferrer">this link</a> for some nice examples and more details.

I think there are plans regarding <a href="http://en.wikipedia.org/wiki/Hierarchical_storage_management" rel="noreferrer">hierarchical storage management (HSM)</a> for ZFS (see for example the <a href="http://opensolaris.org/os/project/adm/" rel="noreferrer">Automatic Data Migration (ADM)</a> OpenSolaris project) but I don't know its current status.

blocks|key|4435383|text|查看基于LVM的"lvmts“(LVM分层存储)解决方案，这个家伙正在编造：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4435384|https://bbs.archlinux.org/viewtopic.php?pid=1140640#p1140640|offset|length|4435385|很酷。|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1O|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|G|5|6|7|S|8|@]|9|@]|A|$]]]|H|$I|$5|J|K|L|A|$M|C]]]]

Check out the LVM based "lvmts" (LVM Tiered Storage) solution this guy is cooking up:

<a href="https://bbs.archlinux.org/viewtopic.php?pid=1140640#p1140640" rel="nofollow noreferrer">https://bbs.archlinux.org/viewtopic.php?pid=1140640#p1140640</a> 

Pretty cool.

blocks|key|697923|text|层似乎满足了您的需要，它是一个linux内核模块，可以创建一个分层存储。它似乎自己学习了模式，并优化了存储的位置。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|697924|http://www.lessfs.com/wordpress/?p=776|offset|length|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|12|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@$D|N|E|O|1|P]]|A|$]]]|F|$G|$5|H|I|J|A|$K|C]]]]

TIER seems to answer your needs
It is a linux kernel module that can create a tiered storage. It seems to learn by itself the pattern and optimize the placement into the storage

<a href="http://www.lessfs.com/wordpress/?p=776" rel="nofollow noreferrer">http://www.lessfs.com/wordpress/?p=776</a>

blocks|key|4435125|text|萨姆-QFS是Sun的现有产品，去年是开源的。它是CDDL，所以您只能直接将它移植到*BSD。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|entityMap|0|LINK|mutability|MUTABLE|url|http://www.opensolaris.org/os/project/samqfs/^0|0|6|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@$A|L|B|M|1|N]]|C|$]]]|D|$E|$5|F|G|H|C|$I|J]]]]

<a href="http://www.opensolaris.org/os/project/samqfs/" rel="nofollow noreferrer">SAM-QFS</a> is Sun's existing product and was open-sourced last year. It's CDDL, so you could only directly port it to *BSD.

blocks|key|697800|text|用我刚发现的东西回答我自己的问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|697801|我只是在更新内核，查看已经添加的新内容，以及允许将(通常是远程)文件系统缓存到本地文件系统的现在有一个“CACHEFILES”选项。我想我可以用它来缓存一个较慢的存储机制(HDD)到一个更快的存储机制(SSD)，至少在一个层次结构中是如此。|offset|length|entityMap|0|LINK|mutability|MUTABLE|url|http://www.mjmwired.net/kernel/Documentation/filesystems/caching/cachefiles.txt^0|0|1A|J|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]]|F|$G|$5|H|I|J|A|$K|L]]]]

Answering my own question with something I just found:

I was just updating the kernel and looking at the new stuff that has been added, and 
<a href="http://www.mjmwired.net/kernel/Documentation/filesystems/caching/cachefiles.txt" rel="nofollow noreferrer">
there is now a 'CACHEFILES' option</a> which allows for caching (usually remote) filesystems to a local filesystem. I guess I could use this to cache a slower storage mechanism (HDD) to a faster one (SSD), at least for one level of hierarchy.

blocks|key|4435340|text|一些相关的链接。YMMV|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4435341|http://code.google.com/p/fscops/+-“在线分层存储管理器(OHSM)是第一次尝试企业级开放源码数据存储管理器，它会自动在高成本和低成本存储介质之间移动数据。”|offset|length|4435342|Linux下的http://www.tack.ch/unix/dmapi/+--+XFS+%2B+DMAPI|4435343|http://jfs.sourceforge.net/+--在Linux下JFS+%2B+DMAPI|entityMap|0|LINK|mutability|MUTABLE|url|http://code.google.com/p/fscops/|1|http://www.tack.ch/unix/dmapi/|2|http://jfs.sourceforge.net/^0|0|0|W|0|0|7|U|1|0|0|R|2^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@$D|W|E|X|1|Y]]|A|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@$D|10|E|11|1|12]]|A|$]]|$1|H|3|I|5|6|7|13|8|@]|9|@$D|14|E|15|1|16]]|A|$]]]|J|$K|$5|L|M|N|A|$O|P]]|Q|$5|L|M|N|A|$O|R]]|S|$5|L|M|N|A|$O|T]]]]

Some relevant links. YMMV.

<a href="http://code.google.com/p/fscops/" rel="nofollow noreferrer">http://code.google.com/p/fscops/</a> -- "Online Hierarchical Storage Manager (OHSM) is the first attempt towards an enterprise level open source data storage manager which automatically moves data between high-cost and low-cost storage media.". 

<a href="http://www.tack.ch/unix/dmapi/" rel="nofollow noreferrer">http://www.tack.ch/unix/dmapi/</a> -- XFS + DMAPI under Linux

<a href="http://jfs.sourceforge.net/" rel="nofollow noreferrer">http://jfs.sourceforge.net/</a> -- JFS + DMAPI under Linux

blocks|key|4435413|text|RAID控制器提供了其中一些功能。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4435414|利用HDD卷前面的SSDs创建高容量、高性能的控制器缓存池|4435415|http://www.lsi.com/channel/products/storagesw/Pages/MegaRAIDCacheCadeSoftware2-0.aspx|offset|length|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|2D|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@]|9|@$F|Q|G|R|1|S]]|A|$]]]|H|$I|$5|J|K|L|A|$M|E]]]]

RAID controllers offer some of these features. 

"Leverages SSDs in front of HDD volumes to create high-capacity, high-performance controller cache pools"

<a href="http://www.lsi.com/channel/products/storagesw/Pages/MegaRAIDCacheCadeSoftware2-0.aspx" rel="nofollow noreferrer">http://www.lsi.com/channel/products/storagesw/Pages/MegaRAIDCacheCadeSoftware2-0.aspx</a>

blocks|key|4434975|text|我想到了LVM2快照.但是，您不能只做一次快照。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|entityMap^0^^$0|@$1|2|3|4|5|6|7|C|8|@]|9|@]|A|$]]]|B|$]]

LVM2 snapshots come to mind... but you can't really do more than a single snapshot.

blocks|key|697958|text|btier+(7岁)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|697959|autofs+(最近的，基于文件的)|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|E|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|F|8|@]|9|@]|A|$]]]|D|$]]

btier (7 years old)
autofs (recent, file based)

Related to <a href="https://serverfault.com/questions/26453/ssd-for-system-and-hdd-for-data-for-desktop-environnement">this question about using an SSD for system and HDD for data</a>, except I would like my system to do this automatically...

Is it possible to have several layers of storage and push items automatically between them, using preferably free, open-source software?

I know of hugely expensive enterprise-class solutions like the EMC SAN-><a href="http://www.emc.com/products/family/emc-centera-family.htm" rel="nofollow noreferrer">EMC Centera</a> automatic archiving, but I was wondering if this sort of staged storage is possible to do automatically.

It would be nice to be able to have several layers in this : Memory->SSD->HDD->slower HDD or tape or some other archive solution.

Are there any filesystems which can do this automatically? (ZFS, Btrfs, HAMMER?)

Any Unix-variants are fine, as I'm interested in how this works and whether it's likely to be portable to Linux or other flavours (BSD etc).

Home-brew automatic tiered storage solutions with Linux? (Memory -> SSD -> HDD -> remote storage)

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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与关于系统使用SSD和数据使用HDD的问题.相关，但我想让我的系统自动完成这个任务.是否有可能有几个层次的存储和自动推送项目之间，最好使用免费的，开放源码软件？我知道非常昂贵的企业级解决方案，如EMC SAN->电磁兼容中心自动存档，但我想知道这种分阶段存储是否可以自动完成。最好能有几个层在这:内存->SSD-> HDD ->较慢的HDD或磁带或其他存档解决方案。是否有任何文件系统可以自动完成此操

问家庭酿造自动分层存储解决方案与Linux？(内存-> SSD -> HDD ->远程存储)
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