[improvement](gson) Serialize database tables as chunked JSON in image - #67332
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[improvement](gson) Serialize database tables as chunked JSON in image#67332zghong wants to merge 2 commits into
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Add GsonStreamUtils to serialize/deserialize tables in chunks instead of one `Text.writeString` call, avoiding the single-string size limit and high memory use when a database has large tables. `Database.writeTables`/`readTables` now use the streaming path. Bumps FE meta version to 141; images written by 141+ are not readable by older FE.
zghong
requested review from
dataroaring,
gavinchou,
mymeiyi,
xiaokang and
yiguolei
as code owners
August 31, 2026 07:21
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Thank you for your contribution to Apache Doris. Please clearly describe your PR:
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run buildall |
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TPC-H: Total hot run time: 16898 ms |
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TPC-DS: Total hot run time: 81981 ms |
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ClickBench: Total hot run time: 14.66 s |
…tadata-serialization
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run buildall |
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FE Regression Coverage ReportIncrement line coverage |
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What problem does this PR solve?
Issue Number: close #67331
Problem Summary:
Database.writeTablespreviously serialized each table with a singleGsonUtils.GSON.toJson+Text.writeStringcall. For databases with very large tables this produces one oversized JSON string, hitting the single-string size limit and causing high peak memory during image write/read.This adds
GsonStreamUtilsto stream tables as chunked JSON, and switchesDatabase.writeTables/readTablesto the streaming path. FE meta version is bumped to VERSION_141; images written by 141+ FE are not readable by older FE.Release note
None
Check List (For Author)
Test
Behavior changed:
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