.x86_64.rpm
-Rw-r -- 1 root 4.6 K July 6 16:53 hadoop-hdfs-secondarynamenode-2.0.5-1.el6.x86_64.rpm
-Rw-r -- 1 root 4.6 K July 6 16:53 hadoop-hdfs-zkfc-2.0.5-1.el6.x86_64.rpm
-Rw-r -- 1 root 17 M July 6 16:53 hadoop-httpfs-2.0.5-1.el6.x86_64.rpm
-Rw-r -- 1 root 26 K July 6 16:53 hadoop-libhdfs-2.0.5-1.el6.x86_64.rpm
-Rw-r -- 1 root 11 M July 6 16:53 hadoop-mapreduce-2.0.5-1.el6.x86_64.rpm
-Rw-r -- 1 root 4.6 K July 6 16:53 hadoop-mapreduce-historyserver-2.0.5-1.el6.x86_64.rpm
-Rw-r -- 1 r
both 2, which indicates that the image operation is performed on two physical disks.
1. view the rootvg size.
# Lsvg rootvgVolume group: rootvg IDENTIFIER: 00f9150300004c0000000145634ba48dVg state: active pp size: 1024 megabyte (s)Vg permission: read/write TOTAL PPs: 1116 (1142784 megabytes)MAX LVs: 256 FREE PPs: 199 (203776 megabytes)LVs: 13 USED PPs: 917 (939008 me
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Bit indicates "bit" or "bit", which is the basis of computer computation;Byte indicates "Byte", which is the basic unit for calculating the computer file size;
The transmission rate of the USB2.0 standard interface. Many people misunderstand "480 Mbps" as Mbit/s. In fact, this is wrong. In fact, "480 Mbps" should be "480 megabits/second" or "Mbps/second", which is
Bit indicates "bit" or "bit", which is the basis of computer computing and belongs to the binary model;
Byte indicates "Byte", which is the basic unit for calculating the computer file size;
The applications of the two are different. Bit is usually used as the unit of data transmission. Because of the physical layer, data link layer transmission is transparent to users, and such communication transmission is based on binary transmission. In the application layer, bytes are usually used as the
of Nr_free statistics idle PID at the same time */
Atomic_dec (init_pid_ns.pidmap[0].nr_free);
Pid_cachep = Kmem_cache (PID, slab_panic);
}
Then look at the start of the Linux kernel in the Start_kernel function in the initialization function of the PID hash table pidhash_init as follows:
void __init pidhash_init (void)
{
int I, pidhash_size;
/*
*nr_kernel_pages represents the total number of kernel memory pages, which is the system DMA and normal
* Total number o
available below, and happiness Linux provides two partitioning tools, Fdisk and Disk Druid, respectively. For beginners, the second kind of intuition. Choose to hang with the partition to start copying files to install. The installation of a look, happy Linux Typical installation will require 1.1G space, if the full installation of the larger, it seems to say if the Chinese Linux stature is only a misinformation, because Windows2000 only need more than 600 trillion.
The following is to set the
times, the CPU will generally not calm. Pictures for demo only
3, no resource-consuming SQL, this is the most reluctant DBA to see the results, because perhaps SQL Server from internal or external pressure, so that they spend too much time to deal with the operating system communication. The performance problems of SQL Server's common query-inefficient classes, most of which come from memory or hard disks, sometimes require a parallel baseline to determine who is the ca
upload, here is to review the script or Razor view, the following is only the view of the changes, for asynchronous upload I took advantage of the asynchronous API in Jquery.form.js, see the following code:
Let's take a screenshot and look at the upload process.
Upload in:
Upload complete:
Of course, the 100% is only for small files in real-time upload, if the big file is certainly not real-time, using other components to achieve more appropriate, here I just learn to learn o
is set to 8. The following example shows to set theEden/survivor spaces ratio to 4:
-xx:survivorratio=4 -xmssize
Sets The initial size (in bytes) of the heap. This value must is a multiple of 1024 and greater than 1 MB. Append the letter K or K to indicate kilobytes, m or m to indicate megabytes, g or G to indicate gigabytes.
The following examples show how to set the size of allocated memory to 6 MB using various units:
-xms6291456
-xms6144k
-xms6m
Topic Address: http://codeforces.com/gym/100247
2014.10.27 Edition
26th training problem, today found a problem has a more efficient solution, with the prefix maximum and suffix maximum value
A. The power of the Dark Side time limit/test 2 seconds memory limit per test 256 megabytes input standard input OUTPU T standard output
On the Jedi tournament n Jedi are battling all other. Every Jedi has three parameters:strength, agility and intelligence. Al
A. Left-handers, right-handers and ambidexters time limit per test 1 second memory limit per test, megabytes input Stan Dard Input Output Standard output
You is at a water bowling training. There is l people who play with their-left hand, R-People, who play with their right hand, and Aambidexters, who can play With left or right hand.
The coach decided to form a team of even number of players, exactly half of the players should play with their right h
can also be calculated that if sampled by 4:4:4, the amount of data in the digital video is 40 megabytes per second. A 10-second digital video consumes 270 gigabytes of storage space at a data rate of 27 megabytes per second. According to this data rate, a 680 megabyte CD-ROM can only record about 25 seconds of digital video data, and even if the current high-speed optical drive, its data transmission rate
the parameter file, specify a PDB, and only the schema.table in the following parameters;Target side each PDB has a replicat process, that is, a replicat process can only be delivered to a single PDB and cannot be delivered to multiple.Source-side Ogg users need to empower: Dbms_goldengate_auth.grant_admin_privilege (' C # #GGADMIN ',container=> ' all '), It is also recommended that the user settings of Ogg be empowered as Grant DBA to C # #ogg Container=all;Source-side DB In addition to the pr
;
-K or--kilobytes
The specified chunk size is 1024 bytes;
-L or--local
Only the local file system is displayed;
-M or--megabytes
The specified chunk size is 1048576 bytes;
--no-sync
Do not perform the sync instruction until the disk usage information is obtained, this is a preset value;
-P or--portability
Use the POSIX output format;
--sync
megabytes
InputStandard input
OutputStandard output
One day Vasya was sitting on a not so interesting Maths lesson and making an origami from a rectangularAMm? ×?BMm sheet of paper (A?>?B). Usually the first step in making an origami is making a square piece of paper from the rectangular sheet by folding the sheet along the bisector of the right angle, and cutting the excess part.
After making a paper ship from the square piece, Vasya looked
Problems # NameAPashaandPixelsstandardinputoutput2s, bytes. 5 s, 256MBx2848CAnyaandGhostsstandardinputoutput2s, 256MBx1671 this time out the first three questions, the original is the third-digit Av
Problems # Name A Pasha and Pixels standard input/output 2 s, 256 MB x3234 B Anton and currency you all know standard input/output 0.5 s, 256 MB x2848 C Anya and Ghosts standard input/output 2 s, 256 MB x1671 this time out the first three questions, the original third-digit Av
Problems
file system is created on a local volume group through NFS.Share mode to establishFlashback Recover Area.
1. Create a file system on node1.
[Root @ aix211/] # lsvg rootvg
VOLUME GROUP: rootvg VG IDENTIFIER: 00040f8a00004c0000000140c6da55a7VG STATE: active PP SIZE: 128 megabyte(s)VG PERMISSION: read/write TOTAL PPs: 546 (69888 megabytes)MAX LVs: 256
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