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MCOL-4912 This patch introduces Extent Map index to improve EM scaleability

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EM scaleability project has two parts: phase1 and phase2.
        This is phase1 that brings EM index to speed up(from O(n) down
        to the speed of boost::unordered_map) EM lookups looking for
        <dbroot, oid, partition> tuple to turn it into LBID,
        e.g. most bulk insertion meta info operations.
        The basis is boost::shared_managed_object where EMIndex is
        stored. Whilst it is not debug-friendly it allows to put a
        nested structs into shmem. EMIndex has 3 tiers. Top down description:
        vector of dbroots, map of oids to partition vectors, partition
        vectors that have EM indices.
        Separate EM methods now queries index before they do EM run.
        EMIndex has a separate shmem file with the fixed id
        MCS-shm-00060001.
This commit is contained in:
Roman Nozdrin
2022-03-30 08:57:05 +00:00
committed by Leonid Fedorov
parent fb3eaabd29
commit 4c26e4f960
25 changed files with 3498 additions and 459 deletions
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21
writeengine/xml/we_xmlgenproc.cpp
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@ -168,7 +168,21 @@ void XMLGenProc::startXMLFile()
// makeTableData
// Create XML tag for a table.
//------------------------------------------------------------------------------
// This method is used by colxml only and it can be relatively slower doing tableRID()
// first call. All subsequent calls will re-use data from CalpontSystemCatalog cache.
void XMLGenProc::makeTableData(const CalpontSystemCatalog::TableName& table)
{
boost::shared_ptr<CalpontSystemCatalog> cat =
CalpontSystemCatalog::makeCalpontSystemCatalog(BULK_SYSCAT_SESSION_ID);
cat->identity(CalpontSystemCatalog::EC);
std::ostringstream oss;
// tableRID method might take a lot with a significant EM.
oss << cat->tableRID(table).objnum;
makeTableData(table, oss.str());
}
void XMLGenProc::makeTableData(const CalpontSystemCatalog::TableName& table, const std::string& tableOIDStr)
{
static unsigned kount;
@ -180,11 +194,8 @@ void XMLGenProc::makeTableData(const CalpontSystemCatalog::TableName& table)
{
try
{
boost::shared_ptr<CalpontSystemCatalog> cat =
CalpontSystemCatalog::makeCalpontSystemCatalog(BULK_SYSCAT_SESSION_ID);
cat->identity(CalpontSystemCatalog::EC);
xmlTextWriterWriteFormatAttribute(fWriter, BAD_CAST xmlTagTable[TAG_TBL_OID], "%d",
cat->tableRID(table).objnum);
xmlTextWriterWriteFormatAttribute(fWriter, BAD_CAST xmlTagTable[TAG_TBL_OID], "%s",
tableOIDStr.c_str());
}
catch (std::exception& ex)
{