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ID Date Icon Author Author Email Category OSdown ELOG Version Subject
  69216   Sat Sep 12 19:19:02 2020 Reply Andreas Luedekeandreas.luedeke@psi.chQuestionAllV2.9.2-2455Re: Insert images slow downs the ELOG

I found the most limiting factor of ELOG to be the file access. ELOG stores all entries in files and therefore has a lot of disk access.

We found that an AFS directory for ELOG is unusable. We tried to store our logbooks on NFS, and it was barely usable but slow. Now we use a local disk on the server, that works fine.

If you want to speed up ELOG the best approach is a dedicated server with a local SSD storage.

Zbigniew Reszela wrote:

Dear all,

First, many thanks for creating and sharing this great tool which is ELOG! Our users are very happy with it!

I have few questions about inserting images into the entries.

From time to time our users insert them directly in the editor what leads to encoding the whole image in the HTML log file and the images does not appear in the attachments list. Saving and further editing of such entries slows down the whole ELOG server which uses 100% of CPU.

I'm not sure how they do it Ctrl+C & Ctrl+V, drag & drop, etc.. What I know is that if they add it using the "Insert image" action in the editor there are no problems and the images are properly listed in the attachments.

I read in the docs:

uploading or downloading an attachement file is a single request, and causes the entire file to be loaded in server memory while the request is being processed.
This is not normally a problem for the sort of short, text-mode entries ELOG is designed to support. However, if a user starts to upload or download a large attachment file (or image) over a slow link, all other users on that ELOG server will have to wait for that transfert to finish before they can access any logbook on that server. This is why there is a low limit on the size of attachments, and why ELOG should not be used to distribute large files under intensive multi-user conditions.

but I think this is not our case. Here I talk about wrongly inserting a single image of 700KiB.

So, I'm asking:

  1. Is the behavior that we observe something already detected? If yes, which are exactly the wrong ways of inserting the images?
  2. Is it fixed in newer ELOG versions?
  3. Is it possible to disable the wrong ways of inserting the images in order to avoid such problems?

Many thanks in advance for your help!

 

  69353   Fri Apr 23 20:08:10 2021 Question Andreas Luedekeandreas.luedeke@psi.chQuestionAllV3.1.4How to format a column in list display?
There is the nice conditional formatting feature for List display:
Cell Style <attribute> <value> = <style>
I would like to use it without conditions: some attributes should always be formatted in a specific way.
 
Specifically I want a generated attribute (combined from other attributes) to be display in monospace font.
The "Format Pikett = 0, attribname, messagelist" works nicely for the single entry display (pik1), but not for List view (pik-list).

Would it be possible to create a new command "List format <attribute> = <css_class_name>,<css_class_value>,<width>,<size>", or is there another way to achieve this?

  69370   Mon Jun 14 17:25:02 2021 Idea Andreas Luedekeandreas.luedeke@psi.chBug reportAllV3.1.4Bug Report with CSS includes (was Re: How to format a column in list display?)

Okay, found some solution for my problem:

List Change Pikett = <div class="pikett">$Pikett</div>
CSS=pikett.css

And file themes/default/pikett.css contains:

.pikett {
  background-color:white;
  font-size:16px;
  font-family:monospace;
  text-align:left;
}

That works like a charm - until I log in to the logbook. Then the include of the CSS in the header is garbled with some "prefix" of random chars:

<link rel="stylesheet" type="text/css" href="elog.css">
<link rel="stylesheet" type="text/css" href="`=T ýpikett.css">

And a quick check in the source code shows some bad code:

L7615: function "show_html_header"

         rsprintf("<link rel=\"stylesheet\" type=\"text/css\" href=\"%s%s\">\n", css_base, css);

Here css_base is a not initialized local variable of the function. In fact the above line is the only reference of that variable char css_base[1000].

The bug is still present in elog-3.1.4-611489b

 

Andreas Luedeke wrote:
There is the nice conditional formatting feature for List display:
Cell Style <attribute> <value> = <style>
I would like to use it without conditions: some attributes should always be formatted in a specific way.
 
Specifically I want a generated attribute (combined from other attributes) to be display in monospace font.
The "Format Pikett = 0, attribname, messagelist" works nicely for the single entry display (pik1), but not for List view (pik-list).

Would it be possible to create a new command "List format <attribute> = <css_class_name>,<css_class_value>,<width>,<size>", or is there another way to achieve this?

 

  69372   Mon Jun 14 18:51:59 2021 Reply Sebastian Schenksebastian.schenk@physik.uni-halle.deBug reportAllV3.1.4Bug Report with CSS includes (was Re: How to format a column in list display?)

Hi Andreas,

the bug you have found was already reported in an earlier issue, together with the same solution you have found.
https://elog.psi.ch/elogs/Forum/69368

Best wishes,
Sebastian

Andreas Luedeke wrote:
[...]

That works like a charm - until I log in to the logbook. Then the include of the CSS in the header is garbled with some "prefix" of random chars:

<link rel="stylesheet" type="text/css" href="elog.css">
<link rel="stylesheet" type="text/css" href="`=T ýpikett.css">

And a quick check in the source code shows some bad code:

L7615: function "show_html_header"

         rsprintf("<link rel=\"stylesheet\" type=\"text/css\" href=\"%s%s\">\n", css_base, css);

Here css_base is a not initialized local variable of the function. In fact the above line is the only reference of that variable char css_base[1000].

The bug is still present in elog-3.1.4-611489b

 

  69373   Sat Jun 19 18:38:21 2021 Question Christian Ospelkauschristian.ospelkaus@iqo.uni-hannover.deQuestionAll3.1.3when using webserver authentication, how can I restrict the users that can edit any given elog?

Dear elog users & developers,

the subject line says it all: when using webserver authentication, how is it possible to restict access of users to any given elog? Only using the apche rules? Admin user and Login user do not seem to be doing anything for me. I am using elog as packaged by debian for buster, using an apache ssl proxy. Thank you for providing this software,

Christian

  69374   Sun Jun 20 14:38:06 2021 Reply Christian Ospelkauschristian.ospelkaus@iqo.uni-hannover.deQuestionAll3.1.3Re: when using webserver authentication, how can I restrict the users that can edit any given elog?

Dear all,

I figured it out. Current global config is (using kerberos instead)

[global]
port = 8081
Default encoding = 0
SSL = 0
Authentication = Kerberos
URL = https://my_url_here/
interface = 127.0.0.1
Password file = global.pwd
SMTP host = my_mail_host
Logfile = /var/log/elog.log
Logging level = 3
User = elog
Grp = elog

Best,

Christian

 

 

Christian Ospelkaus wrote:

Dear elog users & developers,

the subject line says it all: when using webserver authentication, how is it possible to restict access of users to any given elog? Only using the apche rules? Admin user and Login user do not seem to be doing anything for me. I am using elog as packaged by debian for buster, using an apache ssl proxy. Thank you for providing this software,

Christian

 

  69400   Thu Oct 21 11:15:20 2021 Idea Andreas Luedekeandreas.luedeke@psi.chRequestAll3.1.4How about string constants in config files?

My config files are often large and use some shell scripting. In these shell scripting part I interact with files and execute scripts in specific folder.
It would be nice to have the ability to define for example a file path once and reuse it in different parts of the config file. It would help to make config files cleaner. For example:

Constant c_cid = "/usr/local/elog/logbooks/elog-campaignID.default"
Execute new = if ! [ -z "$CampaignID" ] ; then echo "$CampaignID" > $c_cid; fi

Preset CampaignID = $shell( if [ -r $c_cid ] ; then cat $c_cid; else echo None > $c_cid; echo None; fi )

  69413   Mon Nov 15 15:41:04 2021 Idea Anthonyanthony.weathers@pm.meQuestionAll3.1.4Shared logbook and elog.cfg file across multiple installations

Hi,

I'm wondering if it's possible to have a shared logbook and elog.cfg between multiple instances of elog.  Ideally, I'd like to have my logbooks folder and elog.cfg hosted on a nextcloud instance while running the elog service locally.  I've tried this using symlinks and shortcuts on windows with no luck.  I was able to install elog into my mounted nextcloud folder, but this isn't ideal as I would like this to work from multiple computers.

Any ideas or thoughts on how I can do this (if I can actually do this)?

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