spell check + remove comments that caused false positives while spell-checking.
This commit is contained in:
parent
d4f28b84a9
commit
9e19acf64e
1 changed files with 1 additions and 19 deletions
|
@ -203,9 +203,6 @@ We implemented this extension in 150 lines of C, including comments and boilerpl
|
|||
in mind when we wrote \yad, and in fact the idea came from a
|
||||
user unfamiliar with \yad.
|
||||
|
||||
%\e ab{others? CVS, windows registry, berk DB, Grid FS?}
|
||||
%\r cs{maybe in related work?}
|
||||
|
||||
This paper begins by contrasting \yads approach with that of
|
||||
conventional database and transactional storage systems. It proceeds
|
||||
to discuss write-ahead logging, and describe ways in which \yad can be
|
||||
|
@ -503,10 +500,6 @@ increases concurrency. However, it means that follow-on transactions that use
|
|||
the data may need to abort if this transaction aborts ({\em
|
||||
cascading aborts}).
|
||||
|
||||
%Related issues are studied in great detail in terms of optimistic
|
||||
%concurrency control~\cite{optimisticConcurrencyControl,
|
||||
%optimisticConcurrencyPerformance}.
|
||||
|
||||
Nested top actions avoid this problem. The key idea is to distinguish
|
||||
between the logical operations of a data structure, such as
|
||||
adding an item to a set, and internal physical operations such as
|
||||
|
@ -550,12 +543,6 @@ operations:
|
|||
If the transaction that encloses a nested top action aborts, the
|
||||
logical undo will {\em compensate} for the effects of the operation,
|
||||
taking updates from concurrent transactions into account.
|
||||
%If a transaction should perform
|
||||
%some action regardless of whether or not it commits, a nested top
|
||||
%action with a ``no op'' as its inverse is a convenient way of applying
|
||||
%the change. Nested top actions do not force the log to disk, so such
|
||||
%changes are not durable until the log is forced, perhaps manually, or
|
||||
%by a committing transaction.
|
||||
Using this recipe, it is relatively easy to implement thread-safe
|
||||
concurrent transactions. Therefore, they are used throughout \yads
|
||||
default data structure implementations. This approach also works
|
||||
|
@ -734,7 +721,7 @@ This section explains how we can avoid storing LSNs on pages in \yad
|
|||
without giving up durable transactional updates. The techniques here
|
||||
are similar to those used by RVM~\cite{lrvm}, a system that supports
|
||||
transactional updates to virtual memory. However, \yad generalizes
|
||||
the concept, allowing it to co-exist with traditional pages and more easily
|
||||
the concept, allowing it to coexist with traditional pages and more easily
|
||||
support concurrent transactions.
|
||||
|
||||
In the process of removing LSNs from pages, we
|
||||
|
@ -1036,16 +1023,11 @@ perform similarly to comparable monolithic implementations.
|
|||
viewport=-23bp 28bp 625bp 360bp,
|
||||
clip,
|
||||
width=1\columnwidth]{figs/bulk-load.pdf}}
|
||||
%\includegraphics[%
|
||||
% width=1\columnwidth]{bulk-load-raw.pdf}1
|
||||
\caption{\label{fig:BULK_LOAD} Performance of \yad and Berkeley DB hash table implementations. The
|
||||
test is run as a single transaction, minimizing overheads due to synchronous log writes.}
|
||||
\end{figure}
|
||||
|
||||
\begin{figure}[t]
|
||||
%\hspace*{18pt}
|
||||
%\includegraphics[%
|
||||
% width=1\columnwidth]{tps-new.pdf}
|
||||
\graphdbg{\includegraphics[%
|
||||
viewport=-43bp 50bp 490bp 370bp,
|
||||
clip,
|
||||
|
|
Loading…
Reference in a new issue