[jira] Created: (ZOOKEEPER-594) Adding documentation to zkpython to help out with the setup for finding libzookeeper_mt.so.2
Adding documentation to zkpython to help out with the setup for finding libzookeeper_mt.so.2 Key: ZOOKEEPER-594 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-594 Project: Zookeeper Issue Type: Improvement Components: contrib Environment: Have been tested on Fedora 9 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor When setting up and using the zkpython binding, sometimes you encounter the problem that python cannot find the file libzookeeper_mt.so.2. This can be fixed in most cases by for example adding the line export LD_LIBRARY_PATH=/usr/local/lib/ to your .bashrc file. I some cases though, when for example running your python script from within a fcgi context and a lighttpd server it still isn't able to find the file. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Updated: (ZOOKEEPER-594) Adding documentation to zkpython to help out with the setup for finding libzookeeper_mt.so.2
[ https://issues.apache.org/jira/browse/ZOOKEEPER-594?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Erik Holstad updated ZOOKEEPER-594: --- Attachment: ZOOKEEPER-594.patch Adding documentation to zkpython to help out with the setup for finding libzookeeper_mt.so.2 Key: ZOOKEEPER-594 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-594 Project: Zookeeper Issue Type: Improvement Components: contrib Environment: Have been tested on Fedora 9 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Attachments: ZOOKEEPER-594.patch When setting up and using the zkpython binding, sometimes you encounter the problem that python cannot find the file libzookeeper_mt.so.2. This can be fixed in most cases by for example adding the line export LD_LIBRARY_PATH=/usr/local/lib/ to your .bashrc file. I some cases though, when for example running your python script from within a fcgi context and a lighttpd server it still isn't able to find the file. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Updated: (ZOOKEEPER-594) Adding documentation to zkpython to help out with the setup for finding libzookeeper_mt.so.2
[ https://issues.apache.org/jira/browse/ZOOKEEPER-594?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Erik Holstad updated ZOOKEEPER-594: --- Attachment: ZOOKEEPER-594.patch Changed the wording in README after comment from Henry. Also removed the output lines from setup.py, since I don't really think that this information belongs there. Adding documentation to zkpython to help out with the setup for finding libzookeeper_mt.so.2 Key: ZOOKEEPER-594 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-594 Project: Zookeeper Issue Type: Improvement Components: contrib Environment: Have been tested on Fedora 9 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Attachments: ZOOKEEPER-594.patch, ZOOKEEPER-594.patch When setting up and using the zkpython binding, sometimes you encounter the problem that python cannot find the file libzookeeper_mt.so.2. This can be fixed in most cases by for example adding the line export LD_LIBRARY_PATH=/usr/local/lib/ to your .bashrc file. I some cases though, when for example running your python script from within a fcgi context and a lighttpd server it still isn't able to find the file. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12777286#action_12777286 ] Erik Holstad commented on ZOOKEEPER-472: @Mahadev I totally agree that it is hard to follow a patch when there is a lot of crap changes in there. This was not my intention but had to do with the settings that I used, from the beginning and some un clearness on the website about intentations that has since been fixed. Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Updated: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Erik Holstad updated ZOOKEEPER-472: --- Attachment: zookeeper-472.patch Fixed the findbug warning, hopefully, by moving the synchronization away from the node object into the different caller methods. Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12776549#action_12776549 ] Erik Holstad commented on ZOOKEEPER-472: Not really sure what to do about the no test -1. It is kinda hard to include new test for something like this and make it portable in a good way. Since I'm not adding any new functionality, the old tests should be enough, or what is the general opinion on this matter? Erik Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12776580#action_12776580 ] Erik Holstad commented on ZOOKEEPER-472: Sounds good to me. Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Updated: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Erik Holstad updated ZOOKEEPER-472: --- Attachment: zookeeper-472.patch Fixed issues, so that patch applies to trunk Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Updated: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Erik Holstad updated ZOOKEEPER-472: --- Attachment: (was: zookeeper-472-v2.patch) Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12766595#action_12766595 ] Erik Holstad commented on ZOOKEEPER-472: @ Patrik, sorry for not doing this yesterday, had some other stuff that I needed to take care of. Yeah, that patch was created against an older branch, but I updated to trunk in Eclipse and tested it before submitting it, but there seems to have been some issues with that. This patch applied clean on trunk as of this morning using regular patch -p0 Erik Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Updated: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Erik Holstad updated ZOOKEEPER-472: --- Attachment: zookeeper-472.patch Fixed compile error. Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12766626#action_12766626 ] Erik Holstad commented on ZOOKEEPER-472: @ Mahadev, yeah that was my bad. Not sure why my environment didn't show that as an error. Erik Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Updated: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Erik Holstad updated ZOOKEEPER-472: --- Attachment: zookeeper-472.patch Fixed headers Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12766655#action_12766655 ] Erik Holstad commented on ZOOKEEPER-472: @ Mahadev, no reason for it, just a part of the mess with me using another indention scheme for the original patch. Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Work stopped: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Work on ZOOKEEPER-472 stopped by Erik Holstad. Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472-v2.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12765709#action_12765709 ] Erik Holstad commented on ZOOKEEPER-472: @ Patrik , well good thing you cannot take me in the ear and sit me down :) Might want to change the instructions on http://wiki.apache.org/hadoop/ZooKeeper/HowToContribute though, to not make people confused? Remember taking a look there when I started and saw the code. Erik Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472-v2.patch, zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Work started: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Work on ZOOKEEPER-472 started by Erik Holstad. Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-536) the initial size of the hashsets for the watcher is too large
[ https://issues.apache.org/jira/browse/ZOOKEEPER-536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12760092#action_12760092 ] Erik Holstad commented on ZOOKEEPER-536: I think it would be possible to take the same approach as I did in https://issues.apache.org/jira/browse/ZOOKEEPER-472, to instantiate the hashmap, when the first watcher is set. For both issues I guess it might make sense to create a smaller map when actually instantiating too, maybe 8 or so. Erik the initial size of the hashsets for the watcher is too large - Key: ZOOKEEPER-536 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-536 Project: Zookeeper Issue Type: Improvement Reporter: Benjamin Reed setting a watches on a lot of different nodes can be expensive if there is only one watch set on each node. by default the hashset we use to track watches has 16 entries and takes up about 160 bytes. we should probably make the initial size much lower. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Updated: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Erik Holstad updated ZOOKEEPER-472: --- Attachment: zookeeper-472.patch I decided to take a lesser approach and just do what this Jira originally said, so basically creating two new methods, addChild() and removeChild() and making the variable children in DataNode private. The children set in DataNode is not instantiated at node creation but instead the first time addChild() is being called. No synchronization is done one the calls addChild and removeChild since it looks like most other calls are synchronized on the node itself. Not really sure why getChildren is synchronized though, since as far as I can see it all the uses of it are also synchronized on the node. According to the docs it says that 2 spaces should be used instead of 4. Is that a miss in the docs or is that what is really being used? I'm using 2 for this patch. Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Attachments: zookeeper-472.patch Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Created: (ZOOKEEPER-525) Changing children SetString to Setbyte[] in DataNode
Changing children SetString to Setbyte[] in DataNode Key: ZOOKEEPER-525 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-525 Project: Zookeeper Issue Type: Improvement Components: server Reporter: Erik Holstad Priority: Minor Fix For: 3.3.0 For every instance of string there is an overhead of 48B compared to using byte[], on a 64 bit system, that seems unnecessary. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Created: (ZOOKEEPER-526) Change the access pattern in the DataNode from direct access to the use of getters and setters
Change the access pattern in the DataNode from direct access to the use of getters and setters -- Key: ZOOKEEPER-526 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-526 Project: Zookeeper Issue Type: Improvement Components: server Reporter: Erik Holstad Priority: Minor Fix For: 3.3.0 -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
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https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12753929#action_12753929
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Erik Holstad commented on ZOOKEEPER-472:
Did some more coding today and created 3 classes and 1 inteface:
Interface Node
Class EphemeralNode
Class PersistentNode
Class PersistentSortedNode
The problem is that a lot of the class variables from the old DataNode class
are being used like node.data = {}, instead of getting and setting it, which
leads to some weirdness
when the node is no longer a class, but an interface. So the way I see it we
can take two approaches.
1. Having the nodes subclass and override methods from a base class or
2. Start using getters and setters for all variables in the nodes.
Just want to check before I do anything more since this might turn out to be a
quite big change of how the nodes are being used internally.
Erik
Making DataNode not instantiate a HashMap when the node is ephmeral
---
Key: ZOOKEEPER-472
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472
Project: Zookeeper
Issue Type: Improvement
Components: server
Affects Versions: 3.1.1, 3.2.0
Reporter: Erik Holstad
Assignee: Erik Holstad
Priority: Minor
Fix For: 3.3.0
Looking at the code, there is an overhead of a HashSet object for that nodes
children, even though the node might be an ephmeral node and cannot have
children.
--
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You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12754001#action_12754001 ] Erik Holstad commented on ZOOKEEPER-472: @Mahadev Yes the Jira was originally about not instantiating the HashSet before any children where added to the node, so in that case there is only a small reason for not having the persistent and the ephemeral nodes the same. For the sorted node I'm just using a sortedSet instead of the hashset, so all the set methods are still valid to use. Not really sure how many types of nodes there could be, but we have a use case for HBase where this new sorted node would be good. And in the case of more nodes coming into play it might make sense to have an interface of a base class. Sorry about not being clear. Erik Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Commented: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
[ https://issues.apache.org/jira/browse/ZOOKEEPER-472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=12741689#action_12741689 ] Erik Holstad commented on ZOOKEEPER-472: After the HBase meeting this weekend we might have a use case for a new node type which keeps the children sorted, so including that we would have 3 different types of nodes, if this new node would be interesting for ZooKeeper in general. Tying that to this issue I came up with the following: 1. Make a Node interface that only have the following methods copyStat(...) deserialize(...) serialize(...) 2. For the ephemeral nodes this would be it, they wouldn't have to have any notion about children. 3, For the regular nodes and the sorted ones would also have: setChildren(...) addChild(...) getChildren(...) where getChildren(...) could have different return types depending on the node. 4. For the nodes that can have children we also keep the structure uninstantiated until children are actually set or added to the parent. This part I have already done, jsut need to do some more testing on it. Erik Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Components: server Affects Versions: 3.1.1, 3.2.0 Reporter: Erik Holstad Assignee: Erik Holstad Priority: Minor Fix For: 3.3.0 Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
[jira] Created: (ZOOKEEPER-472) Making DataNode not instantiate a HashMap when the node is ephmeral
Making DataNode not instantiate a HashMap when the node is ephmeral --- Key: ZOOKEEPER-472 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-472 Project: Zookeeper Issue Type: Improvement Reporter: Erik Holstad Priority: Minor Looking at the code, there is an overhead of a HashSet object for that nodes children, even though the node might be an ephmeral node and cannot have children. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
