inline deduplication

Http://hub.opensolaris.org/bin/view/Community+Group+zfs/WebHome Https://blogs.oracle.com/bonwick/entry/zfs_dedup Zfs and data deduplication What is deduplication? Deduplication is the process of eliminating duplicate data. The deduplication process can be based on the file-level file level, block-level block

Reading: deduplicationThe emergence of technology has a certain source, so we should start from the beginning. Although the current price of storage media has plummeted, the Unit storage cost is already very low. But it still cannot keep up with the growth rate of enterprise data files. As a result, energy consumption, data backup management, and so on have become difficult issues. In addition, some duplicate files also increase. To this end, enterprises urgently need a technology to ensure that

INSERT into table (ID, name, age) VALUES (1, "A", +) on duplicate key update name=values (name), Age=values (age)/* Insert Data: If there are duplicates, select Update; */Insert ignore into ' testtable ' (' Mpass ', ' Pass ') select Mpass,pass from Rr_pass_0 limit 0,1000000replace into ' testtable ' ( ' Mpass ', ' Pass ') select Mpass,pass from Rr_pass_0 limit 0,10Set PRIMARY key: Discard if duplicate data is selected;SELECT *, COUNT (distinct name) from the table group by nameQuerying for dupli

Tags: where div from greater than equals join AC Max ack reservedQuery for the number of elements not repeatingElements in the query table with a number of elements greater than or equal to 2SELECT goods_id,goods_name from Tdb_goods GROUP by Goods_name have COUNT (goods_name) >=2; Then use the left join to connect the original table with the above query results, delete duplicate records, and keep records with smaller IDsIf you want to keep the same ID for the larger, as shown belowDELETE T1 fro

Q: First of all, inline is annoying. Some books say that the inline keyword should be added before the definition, and the declaration can be omitted. Some say that the inline function will become an inline function when it is added to the Declaration,Some descriptions and definitions must be consistent. Declare a func

Function descriptionData deduplication refers to finding and deleting duplicates in the data without affecting their fidelity or integrity. The goal is to change (32-128 KB) small chunks by splitting the files into sizes, identify duplicate chunks, and then keep a copy of each chunk to store more data in a smaller space. A redundant copy of a chunk is replaced by a reference to a single copy. Chunks are compressed and then organized into the System Vo

This article summarizes four methods of array deduplication in javascript, which are loop matching deduplication, JSON deduplication object deduplication dictionary deduplication, and queue recursive deduplication, the INDEXOF

1. What is deduplication?Simply put, when data is transmitted or stored over the network, multiple identical copies are not transmitted or stored.Data to reduce the occupation of network bandwidth and storage space. In fact, the previous SIS (single-instance storage) is a dedu technology, but its de-duplication unit is file. Currently popularThe deduplication technology is based on data blocks. The de-dupli

Storage has been a major drag to reduce operating costs, although the cost of storage has been decreasing in recent years, but the growth rate of enterprise data is far more than the reduction of storage costs, so how to reduce the pressure on the storage to the enterprise is a big test for IT staffMicrosoft has brought a surprising feature in Windows Server 2012, called Deduplication, which allows Windows Server 2012 to store more data in less physic

Use inline wisely Inline Function ------ a wonderful idea! They look like functions and operate like functions, which are much better than macro (macro) (see clause 1) and do not have to bear the overhead of function calls when using them. Can you have more requirements on them? However, you actually get more from them than you think, because avoiding the overhead of function calls is only a problem. To

1: Definition: They look like functions and operate like functions, which are much better than macro functions and do not need to bear the overhead of function calling. When a function is inline, the compiler can optimize the function body in a specific environment. Such optimization is impossible for "normal" function calls. 2: rules: The Inline keyword must beFunction body DefinitionInline can be implemen

First, the basic definitionInline is a keyword in the C + + language that can be used to define inline functions in a program, and the introduction of inline makes the definition of inline functions simpler. When it comes to inline functions, here is a more common definition, the i