void putEntryOffset(long ledger, long entry, long offset) throws IOException {
int offsetInPage = (int) (entry % entriesPerPage);
// find the id of the first entry of the page that has the entry
// we are looking for
long pageEntry = entry - offsetInPage;
LedgerEntryPage lep = getLedgerEntryPage(ledger, pageEntry, false);
if (lep == null) {
lep = grabLedgerEntryPage(ledger, pageEntry);
}
assert lep != null;
lep.setOffset(offset, offsetInPage * LedgerEntryPage.getIndexEntrySize());
lep.releasePage();
}
