use of org.apache.ignite.internal.pagemem.wal.record.delta.PagesListRemovePageRecord in project ignite by apache.
the class PagesList method removeDataPage.
/**
* @param dataId Data page ID.
* @param dataPage Data page pointer.
* @param dataAddr Data page address.
* @param dataIO Data page IO.
* @param bucket Bucket index.
* @throws IgniteCheckedException If failed.
* @return {@code True} if page was removed.
*/
protected final boolean removeDataPage(final long dataId, final long dataPage, final long dataAddr, DataPageIO dataIO, int bucket) throws IgniteCheckedException {
final long pageId = dataIO.getFreeListPageId(dataAddr);
assert pageId != 0;
final long page = acquirePage(pageId);
try {
long nextId;
long recycleId = 0L;
// Explicit check.
long pageAddr = writeLock(pageId, page);
if (pageAddr == 0L)
return false;
boolean rmvd = false;
try {
PagesListNodeIO io = PagesListNodeIO.VERSIONS.forPage(pageAddr);
rmvd = io.removePage(pageAddr, dataId);
if (!rmvd)
return false;
bucketsSize[bucket].decrementAndGet();
if (needWalDeltaRecord(pageId, page, null))
wal.log(new PagesListRemovePageRecord(cacheId, pageId, dataId));
// Reset free list page ID.
dataIO.setFreeListPageId(dataAddr, 0L);
if (needWalDeltaRecord(dataId, dataPage, null))
wal.log(new DataPageSetFreeListPageRecord(cacheId, dataId, 0L));
if (!io.isEmpty(pageAddr))
// In optimistic case we still have something in the page and can leave it as is.
return true;
// If the page is empty, we have to try to drop it and link next and previous with each other.
nextId = io.getNextId(pageAddr);
// because if we will need to lock previous page, the locking order will be already correct.
if (nextId == 0L) {
long prevId = io.getPreviousId(pageAddr);
recycleId = mergeNoNext(pageId, page, pageAddr, prevId, bucket);
}
} finally {
writeUnlock(pageId, page, pageAddr, rmvd);
}
// Perform a fair merge after lock release (to have a correct locking order).
if (nextId != 0L)
recycleId = merge(pageId, page, nextId, bucket);
if (recycleId != 0L)
reuseList.addForRecycle(new SingletonReuseBag(recycleId));
return true;
} finally {
releasePage(pageId, page);
}
}
use of org.apache.ignite.internal.pagemem.wal.record.delta.PagesListRemovePageRecord in project ignite by apache.
the class PagesList method takeEmptyPage.
/**
* @param bucket Bucket index.
* @param initIoVers Optional IO to initialize page.
* @return Removed page ID.
* @throws IgniteCheckedException If failed.
*/
protected final long takeEmptyPage(int bucket, @Nullable IOVersions initIoVers) throws IgniteCheckedException {
for (int lockAttempt = 0; ; ) {
Stripe stripe = getPageForTake(bucket);
if (stripe == null)
return 0L;
final long tailId = stripe.tailId;
final long tailPage = acquirePage(tailId);
try {
// Explicit check.
long tailAddr = writeLockPage(tailId, tailPage, bucket, lockAttempt++);
if (tailAddr == 0L) {
if (isReuseBucket(bucket) && lockAttempt == TRY_LOCK_ATTEMPTS)
addStripeForReuseBucket(bucket);
continue;
}
if (stripe.empty) {
// Another thread took the last page.
writeUnlock(tailId, tailPage, tailAddr, false);
if (bucketsSize[bucket].get() > 0) {
// Ignore current attempt.
lockAttempt--;
continue;
} else
return 0L;
}
assert PageIO.getPageId(tailAddr) == tailId : "tailId = " + tailId + ", tailPageId = " + PageIO.getPageId(tailAddr);
assert PageIO.getType(tailAddr) == PageIO.T_PAGE_LIST_NODE;
boolean dirty = false;
long dataPageId;
long recycleId = 0L;
try {
PagesListNodeIO io = PagesListNodeIO.VERSIONS.forPage(tailAddr);
if (io.getNextId(tailAddr) != 0) {
// It is not a tail anymore, retry.
continue;
}
long pageId = io.takeAnyPage(tailAddr);
if (pageId != 0L) {
bucketsSize[bucket].decrementAndGet();
if (needWalDeltaRecord(tailId, tailPage, null))
wal.log(new PagesListRemovePageRecord(cacheId, tailId, pageId));
dirty = true;
dataPageId = pageId;
if (io.isEmpty(tailAddr)) {
long prevId = io.getPreviousId(tailAddr);
// to prevent empty page leak to data pages.
if (!isReuseBucket(bucket)) {
if (prevId != 0L) {
Boolean ok = write(prevId, cutTail, null, bucket, FALSE);
assert ok == TRUE : ok;
recycleId = recyclePage(tailId, tailPage, tailAddr, null);
} else
stripe.empty = true;
} else
stripe.empty = prevId == 0L;
}
} else {
// a previous page, so, the current page can be collected
assert isReuseBucket(bucket);
long prevId = io.getPreviousId(tailAddr);
assert prevId != 0L;
Boolean ok = write(prevId, cutTail, bucket, FALSE);
assert ok == TRUE : ok;
bucketsSize[bucket].decrementAndGet();
if (initIoVers != null) {
dataPageId = PageIdUtils.changeType(tailId, FLAG_DATA);
PageIO initIo = initIoVers.latest();
initIo.initNewPage(tailAddr, dataPageId, pageSize());
if (needWalDeltaRecord(tailId, tailPage, null)) {
wal.log(new InitNewPageRecord(cacheId, tailId, initIo.getType(), initIo.getVersion(), dataPageId));
}
} else
dataPageId = recyclePage(tailId, tailPage, tailAddr, null);
dirty = true;
}
// If we do not have a previous page (we are at head), then we still can return
// current page but we have to drop the whole stripe. Since it is a reuse bucket,
// we will not do that, but just return 0L, because this may produce contention on
// meta page.
} finally {
writeUnlock(tailId, tailPage, tailAddr, dirty);
}
// Put recycled page (if any) to the reuse bucket after tail is unlocked.
if (recycleId != 0L) {
assert !isReuseBucket(bucket);
reuseList.addForRecycle(new SingletonReuseBag(recycleId));
}
return dataPageId;
} finally {
releasePage(tailId, tailPage);
}
}
}
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