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= Re: [Vserver] Hashification = * <span class="dfn">This message</span>: [ [[#start|Message body]] ] [ [[#options2|More options]] ] * <span class="dfn">Related messages</span>: [ [[0229.html|Next message]] ] [ [[0227.html|Previous message]] ] [ [[0221.html|In reply to]] ] [ [[0230.html|Next in thread]] ] [ [[#replies|Replies]] ] </div> <div class="mail"> <span id="from"> <span class="dfn">From</span>: Corey Wright <[mailto:undefined_at_pobox.com?Subject=Re:%20%5BVserver%5D%20Hashification undefined_at_pobox.com]> </span><br /> <span id="date"><span class="dfn">Date</span>: Wed 24 May 2006 - 21:44:58 BST</span><br /> <span id="message-id"><span class="dfn">Message-ID</span>: <37300.corey.1148503498.squirrel@squirrelmail> </span><br /> ''> I've been struggling to fully understand how vhashify works for a while''<br /> ''> now. I want to know more about it. It would be nice if someone could''<br /> ''> answer the following questions for me or point to some document which''<br /> ''> can help me understand the vhashify and unify better:''<br /> isn't there a vhashify.c? ;-)<br /> ''> 1) What files and how does vhashify step through and compare for''<br /> ''> unification?''<br /> dunno. i've wondered that myself, and postulated some, but "the proof is<br /> in the pudding" so i haven't questioned it too much.<br /> i'm guessing here, but every file in /etc/vservers/<vserver>/vdir not<br /> explicitly excluded by some pattern in<br /> /etc/vservers/<vserver>/apps/vunify/exclude or<br /> /usr/lib/util-vserver/defaults/vunify-exclude is hashed, looked up in a<br /> hash table (ie files within /etc/vservers/.defaults/apps/vunify/hash/0<br /> named after value of hash of contents), file attributes are compared<br /> against the hardlink in the hash table, and if found equal, then the files<br /> are "unified".<br /> so how close did i get? :-D<br /> herbert, daniel, somebody correct me if i'm wrong.<br /> ''> 2) What things are compared to determine if the files can be unified? In''<br /> ''> other words, what properties of the file should be the same?''<br /> all properties besides file name. at least that's my guess according to<br /> http://www.debian.org/doc/manuals/debian-tutorial/ch-advanced.html#s-advanced-files-hardlinks<br /> as unification just takes advantage of hardlinks (with the special<br /> property of being immutable but unlinkable).<br /> ''> 3) What is the format of an exclude file?''<br /> from http://linux-vserver.org/alpha+util-vserver, under "Directory/vserver<br /> unification":<br /> It has rsync-like excludelists, so that you can e.g. exclude anything<br /> under /etc/ except /etc/termcap; the corresponding excludelist would be<br /> +/etc/termcap<br /> /etc<br /> further see http://samba.anu.edu.au/ftp/rsync/rsync.html, specifically the<br /> FILTER RULES and INCLUDE/EXCLUDE PATTERN RULES sections.<br /> take all the above with a grain of salt as i'm just making educated<br /> guesses. hopefully somebody will at least confirm whether i'm right or<br /> wrong.<br /> corey<br /> <pre> -- undefined@pobox.com _______________________________________________ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver</pre> <span id="received"><span class="dfn">Received on</span> Wed May 24 21:45:29 2006</span> </div> <div class="foot"> * <span class="dfn">This message</span>: [ [[#start|Message body]] ] * <span class="dfn">Next message</span>: [[0229.html|Herbert Poetzl: "Re: [Vserver] Making and using devices inside vservers"]] * <span class="dfn">Previous message</span>: [[0227.html|Daniel Hokka Zakrisson: "Re: [Vserver] Networking: inside and out"]] * <span class="dfn">In reply to</span>: [[0221.html|Fareha Shafique: "[Vserver] Hashification"]] * <span class="dfn">Next in thread</span>: [[0230.html|Fareha Shafique: "Re: [Vserver] Hashification"]] * <span id="replies"></span><span class="dfn">Reply</span>: [[0230.html|Fareha Shafique: "Re: [Vserver] Hashification"]] * <span id="options2"></span><span class="dfn">Contemporary messages sorted</span>: [ [[date.html#228|By Date]] ] [ [[index.html#228|By Thread]] ] [ [[subject.html#228|By Subject]] ] [ [[author.html#228|By Author]] ] [ [[attachment.html|By messages with attachments]] ] </div> <div align="center"> [<nowiki/>[[../|Next/Previous Months]]] [<nowiki/>[http://www.solucorp.qc.ca/miscprj/s_context.hc Main vserver Project Homepage]] [<nowiki/>[http://www.solucorp.qc.ca/mlist/index.hc?list=vserver Howto Subscribe/Unsubscribe]] [<nowiki/>[http://www.paul.sladen.org/vserver/ Paul Sladen's vserver stuff]]<br /> <span class="small">Generated on Wed 24 May 2006 - 21:45:35 BST by [http://www.hypermail.org/ hypermail 2.1.8]</span> </div>
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