I have a setup with 2 masters (nway multimaster) and 4 slaves each having syncrepl set up to connect to the 2 masters. The question I have, with the following configuration (on the slaves) should they always be connected to the masters? Netstat is showing that the connections are intermittent:
type=refreshAndPersist retry="60 +"
Netstat on the masters shows that the connections from the slaves will vary sometimes 0, sometimes 4 seems to be somewhat random. We are trying to determine if there is something wrong in our network. Thanks for the help.
MAT
--On Tuesday, March 30, 2010 12:23 PM -0600 Mathew Rowley mathew_rowley@cable.comcast.com wrote:
I have a setup with 2 masters (nway multimaster) and 4 slaves each having syncrepl set up to connect to the 2 masters. The question I have, with the following configuration (on the slaves) should they always be connected to the masters? Netstat is showing that the connections are intermittent:
type=refreshAndPersist retry="60 +"
Netstat on the masters shows that the connections from the slaves will vary – sometimes 0, sometimes 4 – seems to be somewhat random. We are trying to determine if there is something wrong in our network. Thanks for the help.
Yes, that's what refreshAndPersist implies. The connections from the replica should stay connected to the provider, unless the network is flaky, a firewall is timing them out, etc. Or you stop/restart the slapd on either side. ;)
--Quanah
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration
Can you elaborate on ³a firewall is flakey²? The hosts are physically diverse, each side has 1 master, and 2 slaves, all 3 on the same subnet. Even those connections are on and off. Is there any logging that can explain why this would be happening?
MAT
On 3/30/10 6:51 PM, "Quanah Gibson-Mount" quanah@zimbra.com wrote:
--On Tuesday, March 30, 2010 12:23 PM -0600 Mathew Rowley mathew_rowley@cable.comcast.com wrote:
I have a setup with 2 masters (nway multimaster) and 4 slaves each having syncrepl set up to connect to the 2 masters. The question I have, with the following configuration (on the slaves) should they always be connected to the masters? Netstat is showing that the connections are intermittent:
type=refreshAndPersist retry="60 +"
Netstat on the masters shows that the connections from the slaves will vary sometimes 0, sometimes 4 seems to be somewhat random. We are trying to determine if there is something wrong in our network. Thanks for the help.
Yes, that's what refreshAndPersist implies. The connections from the replica should stay connected to the provider, unless the network is flaky, a firewall is timing them out, etc. Or you stop/restart the slapd on either side. ;)
--Quanah
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc
Zimbra :: the leader in open source messaging and collaboration
--On Tuesday, March 30, 2010 7:15 PM -0600 Mathew Rowley mathew_rowley@cable.comcast.com wrote:
Can you elaborate on "a firewall is flakey"? The hosts are physically diverse, each side has 1 master, and 2 slaves, all 3 on the same subnet. Even those connections are on and off. Is there any logging that can explain why this would be happening?
A firewall that times out sessions, for example...
I would use packet level debugging (You have to start slapd -d packet or slapd -d packets, I forget which (or maybe even both work!)) to see what's going on.
--Quanah
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration
On 3/30/10 8:51 PM, Quanah Gibson-Mount wrote:
--On Tuesday, March 30, 2010 12:23 PM -0600 Mathew Rowley mathew_rowley@cable.comcast.com wrote:
I have a setup with 2 masters (nway multimaster) and 4 slaves each having syncrepl set up to connect to the 2 masters. The question I have, with the following configuration (on the slaves) should they always be connected to the masters? Netstat is showing that the connections are intermittent:
type=refreshAndPersist retry="60 +"
Netstat on the masters shows that the connections from the slaves will vary – sometimes 0, sometimes 4 – seems to be somewhat random. We are trying to determine if there is something wrong in our network. Thanks for the help.
Yes, that's what refreshAndPersist implies. The connections from the replica should stay connected to the provider, unless the network is flaky, a firewall is timing them out, etc. Or you stop/restart the slapd on either side. ;)
... or (possibly) your accesslog purges:
http://www.openldap.org/lists/openldap-software/201003/msg00066.html
Are you using delta-syncrepl?
--On Wednesday, March 31, 2010 12:36 AM -0400 David Hawes dhawes@vt.edu wrote:
Yes, that's what refreshAndPersist implies. The connections from the replica should stay connected to the provider, unless the network is flaky, a firewall is timing them out, etc. Or you stop/restart the slapd on either side. ;)
... or (possibly) your accesslog purges:
http://www.openldap.org/lists/openldap-software/201003/msg00066.html
Are you using delta-syncrepl?
I suggest you file an ITS on this issue (I can confirm I've seen it too).
--Quanah
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration
--On Wednesday, March 31, 2010 9:36 AM -0700 Quanah Gibson-Mount quanah@zimbra.com wrote:
Are you using delta-syncrepl?
I suggest you file an ITS on this issue (I can confirm I've seen it too).
I tracked down the issue and filed an ITS on it: http://www.openldap.org/its/index.cgi/?findid=6519
--Quanah
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration
openldap-software@openldap.org
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David Hawes -
Mathew Rowley -
Quanah Gibson-Mount