combox-paper

notes and other things concerning combox
git clone git://git.ricketyspace.net/combox-paper.git
Log | Files | Refs

commit 4fc18831cf1325f799b75afc256062c1b4072ee0
parent 96f0916d96693ae9cfb781698cab21de99dbbd7b
Author: Siddharth Ravikumar <sravik@bgsu.edu>
Date:   Fri, 25 Mar 2016 01:17:04 +0000

chapter 4 - ; -> , or . or --

Diffstat:
report/chapters/4-testing.tex | 66+++++++++++++++++++++++++++++++++---------------------------------
report/combox-report.pdf | 0
2 files changed, 33 insertions(+), 33 deletions(-)

diff --git a/report/chapters/4-testing.tex b/report/chapters/4-testing.tex @@ -37,11 +37,11 @@ the unit tests were run for the first time on OS X. Another instance where unit tests helped was just before the \verb+v0.2.0+ release. Major changes, including the introduction of file locks in the \verb+ComboxDirMonitor+, were made to the \verb+combox.events+. When -the unit tests were run OS X, two tests failed, revealing a difference -in behavior of watchdog \cite{pylib:watchdog} on GNU/Linux and OS X on -file creation -\footnote{https://git.ricketyspace.net/combox/commit/?id=8c86e7c28738c66c0e04ae7886b44dbcdfc6369exo}; -without unit tests, there is a high probability that this bug would +the unit tests were run on OS X, two tests failed, revealing a +difference in behavior of watchdog \cite{pylib:watchdog} on GNU/Linux +and OS X on file creation +\footnote{https://git.ricketyspace.net/combox/commit/?id=8c86e7c28738c66c0e04ae7886b44dbcdfc6369exo}. +Without unit tests, there is a high probability that this bug would never have been found by now. \subsection{Caveats} @@ -53,7 +53,7 @@ feature did not consider or did not think about while writing the respective feature. Unit tests failed to reveal bugs \#5, \#6, \#7, \#10 and \#11 -\footnote{https://git.ricketyspace.net/combox/plain/TODO.org}; these +\footnote{https://git.ricketyspace.net/combox/plain/TODO.org}. These bugs were found when manually testing combox. \section{Manual testing}\label{sec:4-manual-testing} @@ -82,11 +82,11 @@ nodes. \item On the GNU/Linux machines, the official Dropbox client was used to sync the Dropbox node directory to Dropbox' data store. \verb+rclone+ \cite{program:rclone} was used to sync the - Google Drive node directory to Google Drive' data store; at the time - of testing, Google Drive does not have a client program for + Google Drive node directory to Google Drive' data store. At the time + of testing, Google Drive did not have a client program for GNU/Linux which can sync to Google Drive's data store. \item On OS X, the official Dropbox client was used to sync the - Dropbox node directory to Dropbox's data store; the official Google + Dropbox node directory to Dropbox's data store. The official Google Drive client was used to sync the Google Drive node directory to Google Driver' data store. \item Since combox is extremely event-driven, combox must be started @@ -106,7 +106,7 @@ machine (\verb+grus+) was a physical machine running Debian GNU/Linux testing. The node directories to scatter the files' shards were the Dropbox directory and Google Drive directory. The official Dropbox client was used to automatically sync files from the Dropbox directory -to the Dropbox' data store; \verb+rclone+ \cite{program:rclone} was +to the Dropbox' data store. \verb+rclone+ \cite{program:rclone} was used to sync files from Google Drive directory to Google Drive' data store. @@ -134,11 +134,11 @@ store. file (shard) to its respective location with the appropriate name. \item When a file (shard) was modified on another computer, the Dropbox client pulls the modified file (shard) to this computer - into the \verb+.dropbox.cache+ as a temporary file; moves the old + into the \verb+.dropbox.cache+ as a temporary file, moves the old version of the file (shard) under the Dropbox directory into the - \verb+.dropbox.cache+; finally moves the updated copy of the file, - stored as a temporary file, into the Dropbox directory to its - respective location with the appropriate name. + \verb+.dropbox.cache+, and finally moves the updated copy of the + file, stored as a temporary file, into the Dropbox directory to + its respective location with the appropriate name. \item When a file (shard) was deleted on another computer, the Dropbox client moves the deleted file into the \verb+.dropbox.cache+ directory on this computer. @@ -185,7 +185,7 @@ beautiful there''. - (lyra) sync Google Drive using \verb+rclone+. - (lyra) verify that the latest copy of \verb+walden.pond+ is there in -the combox directory; it should contain 'Peaceful too.' in the last +the combox directory -- it should contain 'Peaceful too.' in the last line. - (lyra) append ``I've a dream'' to \verb+walden.pond+. @@ -195,7 +195,7 @@ line. - (grus) sync Google Drive using \verb+rclone+. - (grus) verify that the latest copy of \verb+walden.pond+ is there in -the combox directory; it should contain ``I've a dream'' in the last +the combox directory -- it should contain ``I've a dream'' in the last line. - (grus) remove \verb+walden.pond+ from combox directory. @@ -229,12 +229,12 @@ was alternatively created/modified/renamed/deleted on one of the machine and it was verified if the respective file was also created/modified/renamed/deleted on the other machine. The GNU/Linux machine was a virtual machine (\verb+lyra+) running Debian GNU/Linux -stable; the OS X machine was on Mavericks (10.9) during the initial +stable, the OS X machine was on Mavericks (10.9) during the initial stage of testing, later it was upgraded to Yosemite (10.10). The node directories to scatter files' shards were the Dropbox directory and the Google Drive directory. The official Dropbox client was used to automatically sync files from the Dropbox directory to the Dropbox' -data store on both the GNU/Linux machine and the OS X machine; the +data store on both the GNU/Linux machine and the OS X machine, the official Google Drive client was used to automatically sync files from the Google Drive directory to Google Drive' data store on OS X and \verb+rclone+ \cite{program:rclone} was used to sync files from the @@ -250,7 +250,7 @@ Google Drive directory to Google Drive's data store on GNU/Linux. unpredictable on this computer and if the first shard (shard0) was stored in the Dropbox directory, it will momentarily disappear before the most updated shard becomes available in the Dropbox - directory; this broke combox. This issue was fixed on 2015-08-25 + directory, this broke combox. This issue was fixed on 2015-08-25 \footnote{https://git.ricketyspace.net/combox/commit/?id=d5b52030348d40600b4c9256f76e5183a85fbb17}. This issue is not got to do with the nature of the setup but it is related to the Dropbox's behavior elaborated in section @@ -259,20 +259,20 @@ Google Drive directory to Google Drive's data store on GNU/Linux. of the file from Google Drive' data store, instead directly updating the respective file on the computer, it deletes the older version of the file and creates the latest version of the file at the - respective location in the Google Drive directory; this behavior of + respective location in the Google Drive directory, this behavior of the Google Drive client confused and broke combox. This issue was fixed 2015-09-06 by making combox aware of the official Google Client's behavior \footnote{https://git.ricketyspace.net/combox/commit/?id=37385a90f90cb9d4dfd13d9d2e3cbcace8011e9e}. \item When a non-empty directory was move/renamed on another computer, - the old directory was not getting properly deleted on this computer; - this was happening because, sometimes, the files under the directory + the old directory was not getting properly deleted on this computer. + This was happening because, sometimes, the files under the directory being renamed were not deleted when it was time for \verb+NodeDirMonitor+ to \verb+rmdir+ the old directory. This issue was fixed on 2015-09-12 \footnote{https://git.ricketyspace.net/combox/commit/?id=9d14db03da5d10d5ab0d7cc76b20e7b1ed5523bf}. \item It was found that \verb+combox.file.rm_path+ function failed - when it was given a non-existent path to remove; this issue was + when it was given a non-existent path to remove, this issue was fixed on 2015-09-12 \footnote{https://git.ricketyspace.net/combox/commit/?id=422238eb4904de14842221fa09a2b4028801afb1}. \end{itemize} @@ -303,7 +303,7 @@ created with content ``peace train''. - (\verb+lyra+) sync Google Drive using \verb+rclone+. - (\verb+lyra+) verify that the file \verb+cat.stevens+ was updated -(modified); last line must have the string ``moonshadow''. +(modified) -- last line must have the string ``moonshadow''. - (\verb+lyra+) append string ``father and son'' to the file \verb+cat.stevens+. @@ -311,7 +311,7 @@ created with content ``peace train''. - (\verb+lyra+) sync Google Drive using \verb+rclone+. - (\verb+dhcp-129-1-66-1+) verify that the file \verb+cat.stevens+ was -updated (modified); last line must have the string ``father and son''. +updated (modified) -- last line must have the string ``father and son''. - (\verb+dhcp-129-1-66-1+) rename file \verb+cat.stevens+ to \verb+yusuf.islam+ @@ -327,17 +327,17 @@ combox was run on a GNU/Linux machine and an OS X machine and a file was alternatively created/modified/deleted on one of the machine and it was verified if the respective file was also create/modified/deleted on the other machine. The GNU/Linux machine -was a physical machine (\verb+grus+) running Debian GNU/Linux testing; +was a physical machine (\verb+grus+) running Debian GNU/Linux testing, The OS X machine was on Mavericks (10.9). The node directories to scatter files' shards were the Dropbox directory, Google Drive directory and the USB stick (\verb+ZAPHOD+, FAT filesystem). The official Dropbox client was used to automatically sync files from Dropbox directory to Dropbox' data store on both the GNU/Linux machine -and the OS X machine; the official Google Drive client was used to +and the OS X machine, the official Google Drive client was used to automatically sync files from the Google Drive directory to Google Drive' data store on OS X and \verb+rclone+ \cite{program:rclone} was used to sync files from the Google Drive directory to Google Drive's -data store on GNU/Linux; the same USB stick (\verb+ZAPHOD+) was used +data store on GNU/Linux, the same USB stick (\verb+ZAPHOD+) was used on both GNU/Linux and Dropbox to store the third shard (shard2) of the files stored in combox directory. @@ -345,7 +345,7 @@ files stored in combox directory. \begin{itemize} \item When a removable USB disk is used as a node, combox must be - turned off before ejecting/unmounting the USB disk; combox does not + turned off before ejecting/unmounting the USB disk, combox does not expect a node directory to disappear when it is running, if the USB disk is removed when combox is running, then combox goes to an undefined state. @@ -419,7 +419,7 @@ content ``the boxer''. stick (\verb+ZAPHOD+). - (\verb+grus+) verify that the file \verb+simon.and.garfunkel+ is -updated; the last line must contain the string ``mrs. robinson''. +updated -- the last line must contain the string ``mrs. robinson''. - (\verb+grus+) remove the file \verb+simon.and.garfunkel+. @@ -588,8 +588,8 @@ intervals. A night of Emacs Lisp indulgence made it possible to quickly slurp the required data from the combox output and calculate the average time to split and encrypt a file and the total amount of time taken to process the files for a given dump -\footnote{https://git.ricketyspace.net/combox-paper/plain/scripts/dumps.el}; -lastly \verb+org-mode+ was used to document all data gathered during +\footnote{https://git.ricketyspace.net/combox-paper/plain/scripts/dumps.el}. +Lastly \verb+org-mode+ was used to document all data gathered during stress testing \footnote{https://git.ricketyspace.net/combox-paper/plain/notes/benchmarks.org}. @@ -623,7 +623,7 @@ stress testing to split and encrypt a file for a given file dump. There is a steep increase in the average time from the \verb+424.79MiB+ dump and the \verb+1620.00MiB+ dump, after which the average time to split and - encrypt a file seems to almost linearly increase; The main reason + encrypt a file seems to almost linearly increase. The main reason for this is that the average file size for dumps from \verb+1620.00MiB+ to \verb+10800.00MiB+ are the same. \end{itemize} diff --git a/report/combox-report.pdf b/report/combox-report.pdf Binary files differ.