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The root cause of the issue lies in the fact that when a sealed segment contains multiple row groups, the get_cells function may receive unordered cids. This can result in row groups being written into incorrect cells during data retrieval. Previously, this issue was hard to reproduce because the old Storage V2 writer had a bug that caused it to write row groups larger than 1MB. These large row groups could lead to uncontrolled memory usage and eventually an OOM (Out of Memory) error. Additionally, compaction typically produced a single large row group, which avoided the incorrect cell-filling issue during query execution. related: https://github.com/milvus-io/milvus/issues/43388, https://github.com/milvus-io/milvus/issues/43372, https://github.com/milvus-io/milvus/issues/43464, #43446, #43453 --------- Signed-off-by: shaoting-huang <shaoting.huang@zilliz.com>
29 lines
1.2 KiB
Go
29 lines
1.2 KiB
Go
// Copyright 2023 Zilliz
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package packed
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const (
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// ColumnGroupSizeThreshold is the threshold of column group size per row.
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ColumnGroupSizeThreshold = 1024 // 1KB
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// DefaultBufferSize is the default buffer size for writing data to storage.
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DefaultWriteBufferSize = 32 * 1024 * 1024 // 32MB
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// DefaultBufferSize is the default buffer size for reading data from storage.
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DefaultReadBufferSize = 32 * 1024 * 1024 // 32MB
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// DefaultMultiPartUploadSize is the default size of each part of a multipart upload.
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DefaultMultiPartUploadSize = 10 * 1024 * 1024 // 10MB
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// Arrow will convert these field IDs to a metadata key named PARQUET:field_id on the appropriate field.
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ArrowFieldIdMetadataKey = "PARQUET:field_id"
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)
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