add compression-type configure annotation，variable default

OpenAtomFoundation · May 7, 2023 · 040e156 · 040e156
1 parent e6dcc61
commit 040e156
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Showing 2 changed files with 2 additions and 1 deletion.
diff --git a/conf/pika.conf b/conf/pika.conf
@@ -341,6 +341,7 @@ max-bytes-for-level-multiplier : 10
 
 # the compression type to use for blob files. All blobs in the same file are compressed using the same algorithm.
 # Supported types: [snappy, zlib, lz4, zstd]. If you do not wanna compress the SST file, please set its value as none.
+# you should compile the Pika from the source code and then link it with other compression algorithm library statically by yourself.
 # blob-compression-type : lz4
 
 # set this to open to make BlobDB actively relocate valid blobs from the oldest blob files as they are encountered during compaction.

diff --git a/include/pika_conf.h b/include/pika_conf.h
@@ -554,7 +554,7 @@ class PikaConf : public pstd::BaseConf {
  bool enable_blob_files_ = false;
  int64_t min_blob_size_ = 4096; // 4K
  int64_t blob_file_size_ = 256 * 1024 * 1024; // 256M
- std::string blob_compression_type_;
+ std::string blob_compression_type_ = "none";
  bool enable_blob_garbage_collection_ = false;
  double blob_garbage_collection_age_cutoff_ = 0.25;
  double blob_garbage_collection_force_threshold_ = 1.0;