disable bz1 recompression

This commit only appends new blocks of points and disables checks for
recompressing small blocks at the end of a series.

CHANGELOG.md

@@ -53,6 +53,7 @@ With this release InfluxDB is moving to Go 1.5.
 - [#4053](https://github.com/influxdb/influxdb/pull/4053): Prohibit dropping default retention policy.
 - [#4060](https://github.com/influxdb/influxdb/pull/4060): Don't log EOF error in openTSDB input.
 - [#3978](https://github.com/influxdb/influxdb/issues/3978): [0.9.3] (regression) cannot use GROUP BY * with more than a single field in SELECT clause
+- [#4058](https://github.com/influxdb/influxdb/pull/4058): Disable bz1 recompression
 
 ## v0.9.3 [2015-08-26]
 

tsdb/engine/bz1/bz1.go

@@ -389,25 +389,14 @@ func (e *Engine) writeIndex(tx *bolt.Tx, key string, a [][]byte) error {
 			return fmt.Errorf("new blocks: %s", err)
 		}
 		return nil
-	} else {
-		// Determine uncompressed block size.
-		sz, err := snappy.DecodedLen(v[8:])
-		if err != nil {
-			return fmt.Errorf("snappy decoded len: %s", err)
-		}
 
-		// Append new blocks if our time range is past the last on-disk time
-		// and if our previous block was at least the minimum block size.
-		if int64(btou64(v[0:8])) < tmin && sz >= e.BlockSize {
-			bkt.FillPercent = 1.0
-			if err := e.writeBlocks(bkt, a); err != nil {
-				return fmt.Errorf("append blocks: %s", err)
-			}
-			return nil
+	} else if int64(btou64(v[0:8])) < tmin {
+		// Append new blocks if our time range is past the last on-disk time.
+		bkt.FillPercent = 1.0
+		if err := e.writeBlocks(bkt, a); err != nil {
+			return fmt.Errorf("append blocks: %s", err)
 		}
-
-		// Otherwise fallthrough to slower insert mode.
-		e.statMap.Add(statSlowInsert, 1)
+		return nil
 	}
 
 	// Generate map of inserted keys.