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-*.aux
-*.bbl
-*.log
-*.nav
-*.out
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diff --git a/2019_12_05_CTA_smart_writing.pdf b/2019_12_05_CTA_smart_writing.pdf
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index 73a6cd64deca8340d7b2c3287e8787b47849b0f4..0000000000000000000000000000000000000000
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diff --git a/2019_12_05_CTA_smart_writing.tex b/2019_12_05_CTA_smart_writing.tex
deleted file mode 100644
index f44d8926581923f60541f0189884aa0a31447805..0000000000000000000000000000000000000000
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-\documentclass[aspectratio=149]{beamer}
-\usepackage[utf8]{inputenc}
-\usepackage[super]{nth}
-\usepackage{adjustbox}
-\usepackage[binary-units=true, per-mode=symbol]{siunitx}
-\usetheme{cern}
-
-% ADC meetings: Data carousel | (discussion)
-% Thursday, 5 December 40/S2-D01 - Salle Dirac
-% https://indico.cern.ch/event/823341/#day-2019-12-05
-
-
-%09:00 → 10:30
-%ADC meetings: Data carousel | (discussion)¶ 40/S2-D01 - Salle Dirac
-%Conveners: Alexei Klimentov (Brookhaven National Laboratory (US)), David Cameron (University of Oslo (NO)), David Michael South (Deutsches Elektronen-Synchrotron (DE)), Johannes Elmsheuser (Brookhaven National Laboratory (US)), Mario Lassnig (CERN), Xin Zhao (Brookhaven National Laboratory (US))
-%
-% 09:00
-% Materials : Tier-1s presentations (October-November splinter meetings), FTS, Rucio, ProdSys2¶ 1m
-%
-%09:01
-%Meeting goals¶ 10m
-%
-%can we agree on the way forward to cut the following two gaps in the meeting
-%
-%Gap 1 : between the throughput out of the tape system itself and the throughput delivered to users (rucio in this case)
-%--This is to tackle the issues along the staging chain, dCache, FTS, Rucio, PS2, etc, to minimize performance penalties to the original tape throughput
-%Gap 2 : between the nominal tape throughput and the current throughput out of tape
-%--This is about “smart writingâ€, by bigger files and/or better organizing files among tapes, to reach higher tape reading efficiency
-%Speakers: Alexei Klimentov (Brookhaven National Laboratory (US)), Mario Lassnig (CERN), Xin Zhao (Brookhaven National Laboratory (US))
-%09:11
-%Summary and highlights of Oct-Nov discussions with Tier 1s and CERN¶ 20m
-%Speakers: Alexei Klimentov (Brookhaven National Laboratory (US)), Mario Lassnig (CERN), Xin Zhao (Brookhaven National Laboratory (US))
-%09:31
-%ATLAS Sites (topical discussion)¶ 59m
-%
-% Planning / notification / feedback /discussions
-% What concerns sites have with tape system throughput (writing/reading) ?
-% -- Active tape drives usage vs drives lifetime (data staging scenario)
-% -- What are the bottlenecks at sites, any planned improvements ?
-% -- What help do they need from ADC, dCache, FTS ? (e.g. sites want the staged files to be transferred out of disk buffer as soon as possible, avoid too many staging retries ...)
-% Site staging profile
-% -- Possible extension ?
-% What can sites do w.r.t. “Smart writing†?
-% -- new features in tape system ?
-% -- external users (eg. ADC/dCache) to create bigger files and/or better organize the order of files when writing to tape ?
-% What are the special concerns for sites supporting multiple-VO ?
-% -- Do we understand requirements and intended usage of tape resources of other VOs ?
-% monitoring tools enough for sites? any suggestions on improving monitoring ?
-%
-%11:00 → 12:30
-%ADC meetings: Data carousel (II)¶ 40/S2-D01 - Salle Dirac
-%Conveners: Alexei Klimentov (Brookhaven National Laboratory (US)), David Cameron (University of Oslo (NO)), David Michael South (Deutsches Elektronen-Synchrotron (DE)), Johannes Elmsheuser (Brookhaven National Laboratory (US)), Mario Lassnig (CERN), Xin Zhao (Brookhaven National Laboratory (US))
-%
-% 11:00
-% dCache global view and development roadmap¶ 25m
-% Speaker: Mr Tigran Mkrtchyan (DESY)
-% 11:25
-% Topical discussion¶ 1h
-% 7 out of 10 T1s run dCache as tape frontend
-% Can dCache provide common solution to improve scalability of dCache HSM interface, something like ENDIT does for TSM sites, that will benefit all dCache sites ?
-% Can dCache group files by datasets in writing to tapes, which will benefit all dCache T1s ?
-% other tape frontend (CTA, StoRM)
-% -- plans ?
-% alternative protocol for tape access ?
-% -- SRM vs QoS APIs ?
-
-
-
-% Based on CERN beamer theme by Jerome Belleman https://github.com/jeromebelleman/beamer-cern
-
-% The optional `\author` command defines the author and is displayed in the slide produced by the `\titlepage` command.
-\author{Eric Cano on behalf of the CTA team}
-
-% The optional `\title` command defines the title and is displayed in the slide produced by the `\titlepage` command.
-\title{CTA Smart writing}
-
-% The optional `\subtitle` command will add a smaller title below the main one, and will not be displayed in any of the slides' footer.
-\subtitle{Conceptual proposition}
-
-% The optional `\date` command will display a custom free text date on the all of the slides' footer. If omitted today's date will be used.
-\date{ADC meetings: Data carousel, 5 Dec 2019}
-
-\setcounter{tocdepth}{1}
-
-\begin{document}
-
-\frontcover
-
-% The optional `\titlepage` command will create a slide with the presentation's title, subtitle and author.
-\frame{\titlepage}
-
-% The optional `\tableofcontents` command will automatically create a table of contents based pm the sections.
-\frame{\tableofcontents}
-
-\section{The problem}
-\begin{frame}{What are we trying to solve?}
- \begin{itemize}
- \item Datasets are always read whole
- \item Tape systems not dataset-aware during write
- \begin{itemize}
- \item Files scattered over tapes $\Rightarrow$ more read mounts
- \item Files interleaved with others within tape
-
- $\Rightarrow$ drive spends time positioning on reads
- \end{itemize}
- \item Making files bigger will impact tape performance
- \begin{itemize}
- \item Tape drive typically faster than file system (\SI{360}{\mega\byte\per\second} today, up to \SI{1}{\giga\byte\per\second} in the roadmaps)
- \item Tape server memory should hold several files to allow streaming them in parallel
- \item Typical tape server memory size: \SI{60}{\giga\byte}
- \item Upper bound for efficient file size: \SI{10}{\giga\byte}
- \end{itemize}
- \end{itemize}
-\end{frame}
-
-\section{Files tagging by dataset name}
-\begin{frame}{Files tagging by dataset name}
-\begin{itemize}
- \item Per-file property
- \item Type = string
- \begin{itemize}
- \item Can we define a length cap?
- \end{itemize}
- \item Only rely on comparison (no ordering, ranking...)
-\end{itemize}
-\end{frame}
-
-\section{User interface}
-\begin{frame}{User interface}
-\begin{itemize}
- \item On write, per file tagging
- \begin{itemize}
- \item Has to go through Rucio/FTS/EOS/CTA
- \end{itemize}
- \item Back tagging of existing files (several scenarios)
- \begin{itemize}
- \item Executed as a one-off, we could have rule based update script
- \item More general: provide get/set operation per file and leave it to the user
- \end{itemize}
-\end{itemize}
-\end{frame}
-
-\section{Tape system optimization}
-\begin{frame}{Tape system optimizations}
-\adjustbox{minipage=1.18\textwidth, scale=0.85}{
-\begin{itemize}
- \item Write optimization
- \begin{itemize}
- \item Divide archive queue in per-dataset sub-queue
- \item Make write mounts stick to a dataset (until it is drained)
- \begin{itemize}
- \item $\Rightarrow$ Contiguous files, zero positioning on read
- \end{itemize}
- \item Possibly cap the per-dataset parallel writes
- \begin{itemize}
- \item $\Rightarrow$ Soft-limiting the spreading over tapes
- \end{itemize}
- \end{itemize}
- \item Repack/defrag
- \begin{itemize}
- \item Repack can then write in an optimized manner (defrag)
- \item Repack input (which files to read) could be dataset driven instead of tape driven
- \begin{itemize}
- \item If extra read mount cost bearable
- \item Will have to take into account tape level constraints as well
- \item Make sure we empty old tapes and not re-repack a target tape
- \item Will it be worth the complexity?
- \end{itemize}
- \end{itemize}
-\end{itemize}
-}
-\end{frame}
-
-\section{Possible bonus features}
-\begin{frame}{Possible bonus features}
-\begin{itemize}
- \item Multi-level tagging, allowing to better choose the {\em{}next} dataset in a mount
- \item Retrieve by dataset (implies big changes in whole data transfer chain, and possibly hairy error handling)
-\end{itemize}
-\end{frame}
-
-\section{Timing and parallel developments}
-\begin{frame}{Timing and parallel developments}
-\begin{itemize}
- \item This concept would take quite some time to implement (many projects involved)
- \item In the shorter term, we plan to rely on the existing
- \begin{itemize}
- \item Temporal collocation
- \item Software RAO will be implemented for LTO drives
- \end{itemize}
-\end{itemize}
-\end{frame}
-
-
-\section{Conclusion}
-\begin{frame}{Conclusions}
-\begin{itemize}
- \item Changes from outside the tape system (bigger files) will push us to a non-optimal working point
- \item With proper hints tape system can optimize read access, knowing that access is done by full dataset
-\end{itemize}
-\end{frame}
-
-\backcover
-
-\end{document}
diff --git a/beamercolorthemecern.sty b/beamercolorthemecern.sty
deleted file mode 100644
index 5a1c6aa1a345a9fba95f0a2edc2aa8a2d5e6d8fe..0000000000000000000000000000000000000000
--- a/beamercolorthemecern.sty
+++ /dev/null
@@ -1,13 +0,0 @@
-% Jerome Belleman <Jerome.Belleman@cern.ch>, March 2015
-
-\mode<presentation>
-
-\definecolor{cern}{RGB}{0,83,161}
-
-\setbeamercolor{structure}{fg=cern}
-\setbeamercolor{footline}{use=structure,
- fg=structure.fg!50!white,
- bg=structure.fg}
-
-\mode
-<all>
diff --git a/beamerfontthemecern.sty b/beamerfontthemecern.sty
deleted file mode 100644
index 57414bd195bcb3efc15582e231f1f49e7c96ab99..0000000000000000000000000000000000000000
--- a/beamerfontthemecern.sty
+++ /dev/null
@@ -1,31 +0,0 @@
-% Jerome Belleman <Jerome.Belleman@cern.ch>, March 2015
-
-\mode<presentation>
-
-% Slightly smaller
-\AtBeginDocument{\fontsize{15}{18}\selectfont}
-
-% Slightly smaller
-\setbeamerfont{title}{size*={22}{25pt}}
-% Slightly smaller
-\setbeamerfont*{frametitle}{parent=title}
-% Slightly smaller
-\setbeamerfont*{section title}{parent=title}
-% Slightly larger
-\setbeamerfont{author}{size*={8}{9.5pt}}
-% Slightly larger
-\setbeamerfont{title in head/foot}{size*={7}{8pt}}
-
-% About the same size
-\setbeamerfont{item}{size*={8}{9.5pt}}
-% About the same size
-\setbeamerfont{subitem}{size*={7}{8pt}}
-% About the same size
-\setbeamerfont{subitem}{size*={6}{7pt}}
-% Slightly smaller
-\setbeamerfont{itemize/enumerate subbody}{size*={12}{14pt}}
-% Slightly smaller
-\setbeamerfont{itemize/enumerate subsubbody}{size*={11}{13.6pt}}
-
-\mode
-<all>
diff --git a/beamerinnerthemecern.sty b/beamerinnerthemecern.sty
deleted file mode 100644
index e02d5dca93610aeef0fdb92468bd8bb9ae55e7c0..0000000000000000000000000000000000000000
--- a/beamerinnerthemecern.sty
+++ /dev/null
@@ -1,42 +0,0 @@
-% Jerome Belleman <Jerome.Belleman@cern.ch>, March 2015
-
-\mode<presentation>
-
-\defbeamertemplate*{title page}{cern}
-{
- \vspace{42pt}
- \begin{beamercolorbox}[leftskip=\titlelf]{title}
- \usebeamerfont{title}\inserttitle
- \ifx\insertsubtitle\@empty
- \else
- \par\usebeamerfont{subtitle}\insertsubtitle
- \fi
- \end{beamercolorbox}
- \vspace{2pt}
- \begin{beamercolorbox}[leftskip=\titlelf]{author}
- \usebeamerfont{author}\insertauthor
- \end{beamercolorbox}
-}
-
-\defbeamertemplate*{section page}{cern}{
- \vfill
- \begin{beamercolorbox}[leftskip=\titlelf]{section title}
- \usebeamerfont{section title}\insertsection
- \end{beamercolorbox}
- \vfill
-}
-
-\defbeamertemplate*{itemize item}{cern}{%
- \raise2pt\hbox{\textbullet}%
-}
-
-\defbeamertemplate*{itemize subitem}{cern}{%
- \raise2pt\hbox{\textbullet}%
-}
-
-\defbeamertemplate*{itemize subsubitem}{cern}{%
- \raise2pt\hbox{\textbullet}%
-}
-
-\mode
-<all>
diff --git a/beamerouterthemecern.sty b/beamerouterthemecern.sty
deleted file mode 100644
index 5cbc333fa246264615663e805bc87ae7051e7e2a..0000000000000000000000000000000000000000
--- a/beamerouterthemecern.sty
+++ /dev/null
@@ -1,64 +0,0 @@
-% Jerome Belleman <Jerome.Belleman@cern.ch>, March 2015
-
-\usepackage{calc}
-\mode<presentation>
-
-% Lengths: trust Inkscape to measure them, PowerPoint if far too approximate
-
-\newlength{\footlinedp}
-\setlength{\footlinedp}{7.127mm * \ratio{128mm}{254mm}}
-\newlength{\footlineht}
-\setlength{\footlineht}{19.454mm * \ratio{128mm}{254mm} - \footlinedp}
-\newlength{\footlinesk}
-\setlength{\footlinesk}{3.338mm * \ratio{128mm}{254mm}}
-
-\newlength{\logowd}
-\setlength{\logowd}{14.046mm * \ratio{128mm}{254mm}}
-\pgfdeclareimage[width=\logowd]{smalllogo}{cern-logo}
-\newlength{\logolw}
-\setlength{\logolw}{\footlinedp - 2.392mm * \ratio{128mm}{254mm}}
-
-\newlength{\footlinetextwd}
-\setlength{\footlinetextwd}{160pt}
-
-\newlength{\numberwd}
-\setlength{\numberwd}{20pt}
-
-\defbeamertemplate*{footline}{cern}
-{
- \ifbeamer@cern@cover
- \else
- \begin{beamercolorbox}[wd=\paperwidth,dp=\footlinedp,ht=\footlineht,
- leftskip=\footlinesk,
- rightskip=\footlinesk]{footline}%
- \usebeamerfont{title in head/foot}%
- \lower\logolw\hbox{\pgfuseimage{smalllogo}}%
- \hfill\makebox[\footlinetextwd][c]{\insertshortdate}%
- \makebox[\footlinetextwd][c]{\insertshorttitle}%
- \makebox[\numberwd][r]{\insertframenumber}%
- \end{beamercolorbox}%
- \fi
-}
-
-\defbeamertemplate*{frametitle}{cern}
-{
- \vspace{16pt}
- % Set depth=0pt to avoid body position from depending on whether title
- % text has any depth or not.
- \begin{beamercolorbox}[dp=0pt,leftskip=\titlelf]{title}
- \usebeamerfont{frametitle}%
- \insertframetitle
- \end{beamercolorbox}
-}
-
-\defbeamertemplate*{navigation symbols}{cern}{}
-
-\defbeamertemplate*{frametitle continuation}{cern}{
- (\insertcontinuationcountroman)
-}
-
-\addtobeamertemplate{footline}{\hfill\usebeamertemplate***{navigation symbols}%
- \hspace*{0.2cm}\par\vskip 10pt}{}
-
-\mode
-<all>
diff --git a/beamerthemecern.sty b/beamerthemecern.sty
deleted file mode 100644
index aae3e8bf86af10d56de09abf17e1d4769687e1c0..0000000000000000000000000000000000000000
--- a/beamerthemecern.sty
+++ /dev/null
@@ -1,52 +0,0 @@
-% Jerome Belleman <Jerome.Belleman@cern.ch>, March 2015
-
-% The size and position of graphical elements was rigorously computed/measured.
-% That of text not so much as I kept the default Beamer font, so I just
-% overlaid the official template to reach a result that's perceivably close.
-
-\mode<presentation>
-
-\newif\ifbeamer@cern@cover
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-
-\newlength{\titlelf}
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-
-\usefonttheme{cern}
-\usecolortheme{cern}
-\useinnertheme{cern}
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-
-\pgfdeclareimage[width=100pt]{frontlogo}{cern-logo}
-\pgfdeclareimage[width=62pt]{backlogo}{cern-logo}
-
-\newcommand{\frontcover}{
- \beamer@cern@covertrue
- {
- \setbeamercolor{background canvas}{bg=cern}
- \frame{
- \vspace{49pt}
- \centerline{\pgfuseimage{frontlogo}}
- }
- }
- \beamer@cern@coverfalse
-}
-
-\newcommand{\backcover}{
- \beamer@cern@covertrue
- {
- \setbeamercolor{background canvas}{bg=cern}
- \frame{
- \vspace{105pt}
- \centerline{\pgfuseimage{backlogo}}
- \vspace{76pt}
- \centerline{%
- \scriptsize\color{cern!50!white}\href{http://home.cern}{home.cern}
- }
- }
- }
- \beamer@cern@coverfalse
-}
-
-\mode
-<all>