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Commit 8ea057b7 authored by Philippe Canal's avatar Philippe Canal
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extend release notes 

git-svn-id: http://root.cern.ch/svn/root/trunk@23773 27541ba8-7e3a-0410-8455-c3a389f83636
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<hr/>
<a name="io"></a>
<h3>I/O</h3>
<br> <ul>
<hr> <li>Unset the kIsReferenced bit before cloning an object in order to avoid the (incorrect/unwanted) registration of the clone.
<A NAME="io"></A> </li>
<H3>I/O</H3> <li>Repaired writing Foreign class in XML files
<p> </li>
Fix schema evolution problem in TTree::Draw by extending support in <li>Extend TDirectoryFile so it can now be derived from.
TStreamerInfo::ReadValueAux to 'converted' numerical types, (see </li>
http://root.cern.ch/phpBB2/viewtopic.php?t=6225) <li>In MakeProject
<p> <ul><li>properly test whether a StreamerElement describe a base class (stl container were not handled correctly).</li>
Repaired writing Foreign class in XML files <li>Remove requirement to have '.' in the PATH to execute the build.</li></ul>
</li>
<li>
Add a new optional parameter to TDirectory::Append: <i><b>replace</b></i>.<br />
If replace is true (the default is false), the Append will
first remove from the directory any existing object and
print the message:
<pre>
Replacing existing OldClass: thename (Potential memory leak).
</pre>
</li>
<li>Add a new option parameter to TDirectory::CloneObject: 'autoadd'
If autoadd is true (the default), CloneObject will call the
object 'DirectoryAutoAdd' function (if any)
</li>
<li>In TDirectory::CloneObject add support for multiple inheritance
from TObject where TObject is not the left most base class.</li>
</ul>
<h4>Schema Evolution</h4>
<ul>
<li>Fix schema evolution problem in TTree::Draw by extending support in
TStreamerInfo::ReadValueAux to 'converted' numerical types, (
<a href=http://root.cern.ch/phpBB2/viewtopic.php?t=6225>see issue in ROOT forum</a>)
<br />
<br />
</li>
<li>When reading more than one TStreamerInfo for the same versioned
class, we now use the highest possible class version as the current
version of the class. Practically, we update the class version
when reading new (higher versioned) StreamerInfo until the Class
is actually used (i.e. TClass::GetClassVersion is call directly
or indirectly).
<br />
In particular, if a file has several StreamerInfos for the same
versioned class, we will use the highest version number as the
'current' class version (as opposed to the lowest until now).
<br />
<br />
</li>
<li>
For backward compatibility TStreamerInfo::BuildCheck compares the checksum of
the on-file StreamerInfo not only to the current value of the class checksum
but also to the checksum calculated using the older algorithms.
<br />
This patch extends this test to also be done when comparing 2 on-file StreamerInfos.
<br />
This removes spurrious warning message when loading 2 older files which
were written with 2 different version of the TClass CheckSum algorithm
(and the in-memory class's version is greater than both TStreamerInfos'
class version).
<br />
<br />
</li>
<li>Extend support of TStreamerInfo::ReadValueAux to 'converted' numerical types, hence solving TTree::Draw's schema evolution problem (see http://root.cern.ch/phpBB2/viewtopic.php?t=6225)
</li>
</ul>
<br> <p />
<hr> <h4>DirectoryAutoAdd</h4>
Use the new DirectoryAutoAdd facility for the classes:
<pre> TTree, TH1, TEventList, TEntryList, TGraph2D</pre>
(and hence their derived classes).
<br />
The instances of those classes are now added automatically
to the current directory only when Constructe'd with arguments or Clone'd
and to the directory they are read from when their are stored
directly in a TKey. <i>[Note: the default constructor never adds
the object to the current directory]</i>
<br />
The directory auto add can still be disabled for instance
of TH1 and TGraph2D by setting <b>TH1::AddDirectory</b>.
<br />
Additionally one can disable the directory auto add for
a specific class by doing:
<pre>
TClass::GetClass("myclass")->SetDirectoryAutoAdd(0)
</pre>
However you might want to also be able to restore the
behavior in which case you ought to do:
<pre>
TClass *cl = TClass::GetClass("myclass");
ROOT::DirAutoAdd_t func = cl->GetDirectoryAutoAdd();
cl->SetDirectoryAutoAdd(0);
</pre>
TROOT::ReadingObject is marked as deprecated.. It is still
set (as it was) but is no longer used by the above mention
classes.
<br />
<b>NOTE</b>: One side effect of this change, is that instance
of TTree, TH1, TEventList, TEntryList, TGraph2D that are
retrieved from a TMessage (i.e. from a socket) no longer
auto register themselves to the current ROOT directory.
<br />
<br/>
<hr/>
<h3>XROOTD</h3> <h3>XROOTD</h3>
<ul> <ul>
<li>Fix problem with setrlimit on MacOsX Leopard<span style="font-family: monospace;"></span></li> <li>Fix problem with setrlimit on MacOsX Leopard<span style="font-family: monospace;"></span></li>
<li><span style="font-family: monospace;"></span>Client:</li> <li><span style="font-family: monospace;"></span>Client:
<ul> <ul>
<li>Optimized file&nbsp;closing recipe<span style="font-family: monospace;"></span></li> <li>Optimized file&nbsp;closing recipe<span style="font-family: monospace;"></span></li>
<li><span style="font-family: monospace;"></span>Fix potential cache thrashing problem with big blocks requests.<span style="font-family: monospace;"></span></li> <li><span style="font-family: monospace;"></span>Fix potential cache thrashing problem with big blocks requests.<span style="font-family: monospace;"></span></li>
</ul> </ul>
<li>Several fixes in the GSI plug-in:</li> </li>
<li>Several fixes in the GSI plug-in:
<ul> <ul>
<li>support for large (&gt; 32 bits) certificate serial numbers in CRL handling</li> <li>support for large (&gt; 32 bits) certificate serial numbers in CRL handling</li>
</ul> </ul></li>
</ul> </ul>
<li>netx:</li> <h4>netx</h4>
<ul> <ul>
<li>TXNetFile:</li> <li>TXNetFile:
<ul> <ul>
<li>Enable per-instance control of the cache parameters also for RAW files;<span style="font-family: monospace;"> </span>by default cache is OFF for these files, but there maybe cases in which<span style="font-family: monospace;"> </span>the cache can improve performances.</li> <li>Enable per-instance control of the cache parameters also for RAW files;<span style="font-family: monospace;"> </span>by default cache is OFF for these files, but there maybe cases in which<span style="font-family: monospace;"> </span>the cache can improve performances.</li>
<li>Remove call to XrdClient::Sync in SysStat</li> <li>Remove call to XrdClient::Sync in SysStat</li>
</ul> </ul></li>
<li>TXNetSystem:</li> <li>TXNetSystem:
<ul> <ul>
<li>Fix problem with GetDirEntry: the entry object was going out-of-scope<span style="font-family: monospace;"> </span>so that the returned string was meaningless.<span style="font-family: monospace;"></span></li> <li>Fix problem with GetDirEntry: the entry object was going out-of-scope<span style="font-family: monospace;"> </span>so that the returned string was meaningless.<span style="font-family: monospace;"></span></li>
<li><span style="font-family: monospace;"></span>Reset the list if dir entries in FreeDirectory.</li> <li><span style="font-family: monospace;"></span>Reset the list if dir entries in FreeDirectory.</li>
</ul> </ul></li>
<li>The implementation of TFile throughput and info sending was
just sending 'regular' samples about the activity of the single TFile
instance that happened to trigger an activity in the right moment.</li>
<li>Now TMonaLisaWriter keeps internally track of every activity
and regularly sends summaries valid for all the files which had
activity in the last time interval.</li>
<li>Additionally, it's now finalized the infrastructure able to measure
and keep track of the file Open latency. A packet is sent for each
successful Open, sending the measures of the latencies for the
various phases of the open. Currently exploited fully by TAlienFile
and TXNetFile. Easy to report from other TFiles too.</li>
<li>Now, the hook for the Close() func triggers sending of a packet
containing various information about the performance related to that
file only.</li>
<li>Added support also for performance monitoring when writing</li>
</ul> </ul>
</ul>
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