database/mariadb-columnstore-engine
1
0
Fork 0
mirror of https://github.com/mariadb-corporation/mariadb-columnstore-engine.git synced 2025-07-30 19:23:07 +03:00
Code Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

36
tools/clearShm/main.cpp
View File

@ -60,7 +60,7 @@ void shmDoit(key_t shm_key, const string& label)
bi::offset_t memSize = 0;
memObj.get_size(memSize);
std::lock_guard<std::mutex> lk(coutMutex);
cout << label << ": shm_key: " << shm_key << "; key_name: " << key_name << "; size: " << memSize
cout << label << ": shm|sem_key: " << shm_key << "; key_name: " << key_name << "; size: " << memSize
<< endl;
}
catch (...)
@ -74,6 +74,11 @@ void shmDoit(key_t shm_key, const string& label)
}
}
void semDoit(key_t sem_key, const string& label)
{
shmDoit(sem_key, label);
}
void shmDoitRange(key_t shm_key, const string& label)
{
if (shm_key == 0)
@ -87,32 +92,6 @@ void shmDoitRange(key_t shm_key, const string& label)
}
}
void semDoit(key_t sem_key, const string& label)
{
string key_name = ShmKeys::keyToName(sem_key);
if (vFlg)
{
try
{
bi::shared_memory_object memObj(bi::open_only, key_name.c_str(), bi::read_only);
bi::offset_t memSize = 0;
memObj.get_size(memSize);
std::lock_guard<std::mutex> lk(coutMutex);
cout << label << ": sem_key: " << sem_key << "; key_name: " << key_name << "; size: " << memSize
<< endl;
}
catch (...)
{
}
}
if (!nFlg)
{
bi::shared_memory_object::remove(key_name.c_str());
}
}
void usage()
{
cout << "usage: clearShm [-cvnh]" << endl;
@ -206,6 +185,8 @@ int main(int argc, char** argv)
tg.add_thread(tp);
tp = new boost::thread(ThdFunc(BrmKeys.KEYRANGE_VSS_BASE, "VSS "));
tg.add_thread(tp);
tp = new boost::thread(ThdFunc(BrmKeys.KEYRANGE_EXTENTMAP_INDEX_BASE, "EXTMAP_INDX"));
tg.add_thread(tp);
tg.join_all();
shmDoit(BrmKeys.MST_SYSVKEY, "MST ");
@ -226,6 +207,7 @@ int main(int argc, char** argv)
semDoit(BrmKeys.KEYRANGE_EMFREELIST_BASE, "EXTMAP_FREE");
semDoit(BrmKeys.KEYRANGE_VBBM_BASE, "VBBM ");
semDoit(BrmKeys.KEYRANGE_VSS_BASE, "VSS ");
semDoit(BrmKeys.KEYRANGE_EXTENTMAP_INDEX_BASE, "EXTMAP_INDX");
semDoit(BrmKeys.MST_SYSVKEY, "MST ");
if (!cFlg)