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Patrick Kursawe wrote: |
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> I wonder how LDAP should have a better performance than rsync? |
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> Are there implementations that support compression while transmitting |
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> only the delta between entries? |
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Directory services work very differently than rsync. I do believe that |
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compression is supported (specifically in openldap) between servers |
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during replication. The way ldap works (quick and dirty) is that when a |
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change is made to the master, the change is written to a log file. |
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Another daemon (again, specific implementation of openldap) is |
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constantly reading the transaction log and sends the updates down the |
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line to slaves. In theory, it is similar to the way DNS works |
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(propagation and referals). If you decide that replication is |
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undesirable, referrals allow you to tell your *local* ldap server to |
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resend the request to a designated parent (which then can resend and |
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resend and so on) - this is much like DNS. What's cool is that a stream |
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of single transactions would be consistently flowing through the |
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(hypotetical) network of Gentoo master ldap servers which could be |
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accessed by region by users using portage. The performance would |
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probably be better because (AFAIK) less overall traffic should be |
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required and ldap has provisions for defering load (replication and |
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referrals). |
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> I have next to no experience with directory services, so could you |
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> please outline a bit further why you think this is better than rsync |
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> or a database? |
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Further reading might describe it better than I can. Check out |
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http://www.openldap.org for the details. |
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> Yours sceptically, |
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Hehhehe... if everyone just jumped at it, things would get messy fast. ;) |
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-- |
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Eric Sammer |
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eric@××××××××××××.com |
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http://www.ineoconcepts.com |
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-- |
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gentoo-dev@g.o mailing list |
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