[
https://issues.apache.org/jira/browse/DERBY-646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12688889#action_12688889
]
Knut Magne Solem commented on DERBY-646:
----------------------------------------
Good to see something is happening in this field! Out of curiosity I tried this
out on Windows XP, but it failed in embedded mode when creating an in-memory
database.
The error was this assert:
ERROR XJ001: Java exception: 'ASSERT FAILED serviceName = memory:C:\Documents
and Settings\user\workspace\derby\MyDbTest;storageFactory.getCanonicalName() =
C:\Documents and Settings\user\workspace\derby\MyDbTest:
org.apache.derby.shared.common.sanity.AssertFailure'.
To make it work I altered line 310 in VFMemoryStorageFactory.normalizePath() to
allow windows-style paths. I changed it to this: "} else if (dir.charAt(0) !=
getSeparator() && !dir.toUpperCase().matches("[a-zA-Z]{1}:{1}\\\\{1}.*")){"
Appart from that i worked great.
To reduce memory footprint I guess you can reduce the cache to a minimum and
maybe discard flushed log records instead of writing them to memory?
Knut Magne,
(previous user knutmas)
> In-memory backend storage support
> ---------------------------------
>
> Key: DERBY-646
> URL: https://issues.apache.org/jira/browse/DERBY-646
> Project: Derby
> Issue Type: New Feature
> Components: Store
> Affects Versions: 10.5.0.0
> Environment: All
> Reporter: Stephen Fitch
> Assignee: Kristian Waagan
> Attachments: derby-646-1a-raw-compiles.diff,
> derby-646-1a-raw-compiles.stat, derby-646-20090222.diff,
> derby-646-20090222.stat, derby-646-2a-vfmem_first_rev.diff,
> derby-646-2a-vfmem_first_rev.stat, derby-646-2b-vfmem_first_rev.diff,
> derby-646-3a-jmx_experiment.diff, derby-646-performance_comparison_1a.txt,
> svn.diff
>
>
> To allow creation and modification of databases in-memory without requiring
> disk access or space to store the database.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
