Open the DataStore in read mode when exporting
Open the DataStore in read mode when exporting


Former-commit-id: e48010af6bfbccb91ca1cc21839d1eba5a66c28c [formerly 2bdc2557b6b3341fe4e1c8ef34cf5b2a983e84b8] [formerly 2bdc2557b6b3341fe4e1c8ef34cf5b2a983e84b8 [formerly a5a398fcd0b9eac8932b7aaa95d2afc3e47084bc]]
Former-commit-id: c547908d1d7c3710a08b8443beda1875fee50aec
Former-commit-id: aabe948b01c92c2711f94b438e4103db7ddcddca
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine