Discussion:
[openjms-developer] Usage of JDBM : Experience feedbacks
Florent Gratta
2008-10-22 10:04:18 UTC
Permalink
Hi All,

I am currently Project Lead at Sicap, a Swiss company which designs
softwares for mobile operators and the mobile network world in general.

We are going to use a BTree library to index entries of csv files. We
have identified JDBM library (http://jdbm.sourceforge.net/) and we have
seen that you are currently using it in Open JMS.

As there is no more tracker activity on this project and it seems that
it is the same thing for support, we would like to know if JDBM is
stable:

==> Have you encountered problems when you use this library in
multithreaded mode: Several concurrent inserts at a time?
==> What is the behaviour of the library when we shut down with
emergency? Is it robust? By this way, does BTree file could be
corrupted?
==> Do you encountered performance lack in some cases?
==> Is there some limitations or lacks: Size of the index chain,
cache size etc ...
==> Etc ...

We are very interested on your feedbacks and experiences on JDBM library
usage ?

Thank's a lot,
Kind Regards,
Florent GRATTA

Framework Project Leader, DeVelopment and Operation, Sicap France SAS
Phone +334 37 37 69 96, Fax +334 37 37 69 99, Mobile +336 81 76 58 02
Postal Address: 50 rue de marseille, 69007 Lyon, France
mailto: ***@sicap-france.com, http://www.sicap.com, Skype:
florent_gratta


This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and delete this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden.




This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and delete this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden.
Tim Anderson
2008-10-26 22:54:01 UTC
Permalink
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
We no longer support JDBM, as we had issues with database corruption.<br>
<br>
-Tim<br>
<br>
Florent Gratta wrote:
<blockquote
cite="mid:***@exchange2003.intranet.swapcom.fr"
type="cite">
<meta http-equiv="Content-Type" content="text/html; ">
<meta name="Generator"
content="MS Exchange Server version 6.5.7652.24">
<title>Usage of JDBM : Experience feedbacks</title>
<!-- Converted from text/rtf format -->
<p align="left"><span lang="fr"><font face="Arial" size="2">Hi All,</font></span></p>
<p align="left"><span lang="en-gb"><font face="Arial" size="2">I am
currently Project Lead at Sicap, a Swiss company which designs
softwares for mobile operators and the mobile network world in general.</font></span></p>
<p align="left"><span lang="en-gb"><font face="Arial" size="2">We are
going to use a BTree library to index entries of csv files. We have
identified JDBM library (</font></span><span lang="fr"></span><a
moz-do-not-send="true" href="http://jdbm.sourceforge.net/%29"><span
lang="fr"></span><span lang="fr"></span><u><span lang="en-gb"><font
color="#0000ff" face="Arial" size="2">http://jdbm.sourceforge.net/)</font></span></u><span
lang="fr"></span></a><span lang="fr"></span><span lang="fr"></span><span
lang="en-gb"><font face="Arial" size="2"> and we have seen that you
are currently using it in</font></span><span lang="fr"></span><span
lang="fr"></span><span lang="en-gb"> <font color="#000000"
face="Arial" size="2">Open JMS</font></span><span lang="fr"></span><span
lang="fr"></span><span lang="en-gb"><font face="Arial" size="2">.</font></span></p>
<p align="left"><span lang="en-gb"><font face="Arial" size="2">As
there is no more tracker activity on this project and it seems that it
is the same thing for support, we would like to know if JDBM is stable:</font></span></p>
<p><span lang="en-gb"><font face="Wingdings" size="2">&egrave;<font
face="Courier New">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></font></span><span lang="en-gb"></span><span
lang="fr"></span><span lang="fr"></span><span lang="en-gb"> <font
face="Arial" size="2">Have you encountered problems when you use this
library in multithreaded mode: Several concurrent inserts at a time?</font></span></p>
<p><span lang="en-gb"><font face="Wingdings" size="2">&egrave;<font
face="Courier New">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></font></span><span lang="en-gb"> <font
face="Arial" size="2">What is the behaviour of the library when we
shut down with emergency? Is it robust? By this way, does BTree file
could be corrupted?</font></span></p>
<p><span lang="en-gb"><font face="Wingdings" size="2">&egrave;<font
face="Courier New">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></font></span><span lang="en-gb"> <font
face="Arial" size="2">Do you encountered performance lack in some
cases?</font></span>
<br>
<span lang="en-gb"><font face="Wingdings" size="2">&egrave;<font
face="Courier New">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></font></span><span lang="en-gb"> <font
face="Arial" size="2">Is there some limitations or lacks: Size of the
index chain, cache size etc ...</font></span>
<br>
<span lang="en-gb"><font face="Wingdings" size="2">&egrave;<font
face="Courier New">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font></font></span><span lang="en-gb"> <font
face="Arial" size="2">Etc ...</font></span>
</p>
<p align="left"><span lang="en-gb"><font face="Arial" size="2">We are
very interested on your feedbacks and experiences on JDBM library usage
?</font></span></p>
<p align="left"><span lang="fr-fr"><font face="Arial" size="2">Thank&#8217;s
a lot,</font></span></p>
<p align="left"><span lang="fr-fr"><font face="Arial" size="2">Kind
Regards,</font></span></p>
<p align="left"><span lang="fr-fr"><font face="Arial" size="2">Florent
GRATTA</font></span></p>
<p align="left"><span lang="fr-fr"><font face="Arial" size="1">Framework
Project Leader, DeVelopment and Operation, Sicap France SAS</font></span></p>
<p align="left"><span lang="fr-fr"><font face="Arial" size="1">Phone
+334 37 37 69 96, Fax +334 37 37 69 99, Mobile +336 81 76 58 02</font></span></p>
<p align="left"><span lang="fr-fr"><font face="Arial" size="1">Postal
Address: 50 rue de marseille, 69007 Lyon, France</font></span></p>
<p align="left"><span lang="fr-fr"><font face="Arial" size="1">mailto:</font></span><span
lang="fr"> </span><a moz-do-not-send="true"
href="mailto:***@sicap-france.com"><span lang="fr"></span><span
lang="fr"></span><u><span lang="fr-fr"><font color="#0000ff"
face="Arial" size="1">***@sicap-france.com</font></span></u><span
lang="fr"></span></a><span lang="fr"></span><span lang="fr"></span><span
lang="fr-fr"><font face="Arial" size="1">,</font></span><span lang="fr">
</span><a moz-do-not-send="true" href="http://www.sicap.com"><span
lang="fr"></span><span lang="fr"></span><u><span lang="fr-fr"><font
color="#0000ff" face="Arial" size="1">http://www.sicap.com</font></span></u><span
lang="fr"></span></a><span lang="fr"></span><span lang="fr"></span><span
lang="fr-fr"><font face="Arial" size="1">, Skype: florent_gratta</font></span></p>
<!--[object_id=#sicap-france.com#]--><font face="Tahoma" size="2"><font
color="#0000ff">
<div dir="ltr"><span><font color="#000000" face="Arial" size="1">
<hr></font></span></div>
<div dir="ltr"><span><font color="#000000" face="Arial" size="1">This
e-mail may contain confidential and/or privileged information. If you
are not the intended recipient (or have received this e-mail in error)
please notify the sender immediately and delete this e-mail. Any
unauthorised copying, disclosure or distribution of the material in
this e-mail is strictly forbidden.</font></span></div>
</font></font>
<pre wrap="">
</pre>
</blockquote>
<br>
</body>
</html>

Loading...