sf-daq/sf_daq_buffer
0
0
Fork 0
mirror of https://github.com/paulscherrerinstitute/sf_daq_buffer.git synced 2026-04-22 19:34:36 +02:00
Code Issues Packages Projects Releases Wiki Activity

Improve README and fill in more info

Browse Source
This commit is contained in:
babic_a
2020-07-23 13:46:46 +02:00
parent 98be7b9e5c
commit 60b8757a65
1 changed files with 9 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
README.md
+9 -5
View File
@@ -47,15 +47,15 @@ else is not part of this project and should be addresses elsewhere.
## Terminology
In order to unify the way we write code and talk about concept the following
In order to unify the way we write code and talk about concepts the following
terminology definitions should be followed:
- frame (data from a single module)
- image (assembled frames)
- start_pulse_id and stop_pulse_id (not end_pulse_id) is used to determine the
- start_pulse_id and stop_pulse_id is used to determine the
inclusive range (both start and stop pulse_id are included) of pulses.
- pulse_id_step (how many pulses to skip between each image).
- GPFS buffer (on GPFS detector buffering mechanism based on binary files)
- GPFS buffer (detector buffering mechanism based on binary files on GPFS)
- detector_folder (root folder of the buffer for a specific detector on disk)
- module_folder (folder of one module inside the detector_folder)
- data_folder (folder where we group more buffer files based on pulse_id range)
@@ -104,8 +104,8 @@ ln -s "$(pwd)""/""sf_writer" /usr/bin/sf_writer
Zeromq version 4.1.4 (default on RH7) has a LINGER bug. Sometimes, the last
message is not sent (the connection gets dropped before the message is in the buffer).
Since we use PUSH/PULL only in sf-stream at the moment, this is not critical anymore.
But in the future we might use the PUSH/PULL mechanism, so updating to the latest
We are currently not using LINGER to extend our processes lifetime, so this is
not critical. But in the future this might change, so updating to the latest
version of ZMQ should help us prevent future bug hunting sessions.
Please install a later version:
@@ -120,6 +120,10 @@ yum install zeromq-devel
## Useful links
This is a collections of best links we came across so far during the development of
this project. They cover various topics somehow related to what we are trying to
achieve.
### Architecture
- POSIX compliant write order test on GPFS
https://svn.hdfgroup.org/hdf5/branches/hdf5_1_10_0/test/POSIX_Order_Write_Test_Report.pdf