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From Raymond Wilson <raymond_wil...@trimble.com>
Subject RE: Specifying location of persistent storage location
Date Mon, 04 Sep 2017 22:37:27 GMT
Hi,



I definitely have not had more than one server node running at the same
time (though there have been more than one client node running on the same
machine).



I suspect what is happening is that one or more of the network interfaces
on the machine can have their address change dynamically. What I thought of
as a GUID is actually (I think) an IPv6 address attached to one of the
interfaces. This aspect of the folder name tends to come and go.



You can see from the folder names below that there are quite a number of
addresses involved. This seems to be fragile (and I certainly see the name
of this folder changing frequently), so I think being able to set it to
something concrete would be a good idea.



Thanks,
Raymond.





*From:* Dmitriy Setrakyan [mailto:dsetrakyan@apache.org]
*Sent:* Tuesday, September 5, 2017 10:23 AM
*To:* user <user@ignite.apache.org>
*Cc:* Raymond Wilson <raymond_wilson@trimble.com>
*Subject:* Re: Specifying location of persistent storage location



Hi Raymond,



Sorry for the initial confusion. The consistent ID is the combination of
the local IP and port. You DO NOT need to do anything special to configure
it.



If you had different folders created under the work folder, you probably
had more than one node running at the same time. Can you please make sure
that it was not the case?



D.



On Mon, Sep 4, 2017 at 2:55 PM, Raymond Wilson <raymond_wilson@trimble.com>
wrote:

Hi Dmitry,



I looked at IgniteConfiguration in the C# client, but it does not have
consistentID in its namespace.



I pulled the C# client source code and searched in there and was not able
to find it. Perhaps this is not exposed in the C# client at all?



If that is that case, how would I configure this?



Thanks,

Raymond.



*From:* Dmitry Pavlov [mailto:dpavlov.spb@gmail.com]
*Sent:* Tuesday, September 5, 2017 9:24 AM


*To:* user@ignite.apache.org
*Subject:* Re: Specifying location of persistent storage location



Hi Ramond,



Node.Consistent ID by default is the sorted set of local IP addresses and
ports. This field value survives during node restart.



At the same time consistent ID may be set using
IgniteConfiguration.setConsistentId() if you need to specify it manually.

I'm not sure how to write in C# syntax, but I am pretty sure it may be
configured.



Sincerely,

Dmitriy Pavlov



вт, 5 сент. 2017 г. в 0:12, Raymond Wilson <raymond_wilson@trimble.com>:

… also, the documentation for ClusterNode here (
https://www.gridgain.com/sdk/pe/latest/javadoc/org/apache/ignite/cluster/ClusterNode.html)
only describes a getter for the consistent ID, I need to be able to set it.



*From:* Raymond Wilson [mailto:raymond_wilson@trimble.com]
*Sent:* Tuesday, September 5, 2017 9:06 AM
*To:* 'user@ignite.apache.org' <user@ignite.apache.org>
*Subject:* RE: Specifying location of persistent storage location



Apologies if this is a silly question, but I’m struggling to see how to get
at the consistentID member of ClusterNode on the C# client.



If I look at IClusterNode I only see “Id”, which is the ID that changes
each restart. Is consistentID a Java client only feature?



Thanks,

Raymond.



*From:* Raymond Wilson [mailto:raymond_wilson@trimble.com
<raymond_wilson@trimble.com>]
*Sent:* Tuesday, September 5, 2017 6:04 AM
*To:* user@ignite.apache.org
*Subject:* Re: Specifying location of persistent storage location



Thank you Dmitry!

Sent from my iPhone


On 5/09/2017, at 1:12 AM, Dmitry Pavlov <dpavlov.spb@gmail.com> wrote:

Hi Raymond,



Ignite Persistent Store includes consistentID parameter of cluster node
into folders name. It is required because there is possible that 2 nodes
would be started at same physical machine.



Consistency of using same folder each time is provided by this property,

ClusterNode.consistentID - consistent globally unique node ID. Unlike
ClusterNode.id this parameter constains consistent node ID which survives
node restarts.



Sincerely,

Dmitriy Pavlov





сб, 2 сент. 2017 г. в 23:40, Raymond Wilson <raymond_wilson@trimble.com>:

Hi,



I’m running a POC looking at the Ignite Persistent Store feature.



I have added a section to the configuration for the Ignite grid as follows:



            cfg.PersistentStoreConfiguration = new
PersistentStoreConfiguration()

            {

                PersistentStorePath = PersistentCacheStoreLocation,

                WalArchivePath = Path.Combine(PersistentCacheStoreLocation,
"WalArchive"),

                WalStorePath = Path.Combine(PersistentCacheStoreLocation,
"WalStore"),

            };



When I run the Ignite grid (a single node running locally) it then creates
a folder inside the PersistentCacheStoreLocation with a complicated name,
like this (which looks like a collection of IP addresses and a GUID for
good measure, and perhaps with a port number added to the end):



0_0_0_0_0_0_0_1_10_0_75_1_10_3_72_117_127_0_0_1_192_168_121_1_192_168_178_27_192_168_3_1_2406_e007_9e5_1_9cc8_92bc_50c9_6794_2406_e007_9e5_1_c5d8_af4b_55b2_582a_47500
,



Within that folder are then placed folders containing the content for each
cache in the system



Oddly, if I stop and then restart the grid I sometime get another folder
with a slightly different complicated name, like this:



0_0_0_0_0_0_0_1_10_0_75_1_10_3_72_117_127_0_0_1_192_168_121_1_192_168_178_27_192_168_3_1_2406_e007_9e5_1_a58c_2f32_8005_b03d_2406_e007_9e5_1_c5d8_af4b_55b2_582a_47500



How do I ensure my grid uses the same persistent location each time? There
doesn’t seem anything obvious in the PersistentStoreConfiguration that
relates to this, other than the root location of the folder to store
persisted data.



Thanks,
Raymond.

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