NIO or IO

It seems block or non-blocking address the FD limitation previously existing on the server. There is a work around to improve the FD limitation. However, from server socket processing with sequential by nature. I tend to suggest to take blocking IO for normal mid-large workload but small-mid workload take unblocking approach since it functionally replicate Queuing algorithms

Inetmenu good for Laptop

It is a good tool to assign IP for laptop

It requires root to run then get IP from DHCP server or Wireless Access Points.

S11 NV build Laptop

(1). Solaris Express, Developer version build installation
(2). If it is under SWAN, it will bypass a lot of setup to go straight with default
NIS process.
(3). It requires sys-unconfig process if you want change other things. Do not enable DHCP here
but use inetmenu

However, sys-unconfig will not give you option to change host name

So, it is important to get hostname change process.

To change the hostname on a Solaris system:

1. Change the hostname in /etc/nodename
2. Run uname -S new_hostname to change the nodename for your current session.
3. Change the hostname in /etc/hostname.network_interface (e.g. /etc/hostname.hme0)
4. Run hostname new_hostname to change the hostname for your current session.
5. Change the hostname in /etc/hosts
6. Change the hostname in /etc/net/*/hosts (/etc/net/ticlts/hosts, /etc/net/ticots/hosts, /etc/net/ticotsord/hosts)
for directory in ticlts ticots ticotsord
do
cd /etc/net/$directory
sed 's/old_hostname/new_hostname/g' hosts > hosts.new
mv hosts.new hosts
done
Solaris 7 or later additional instructions:
7. Change the hostname in DUMPADM_SAVDIR= line in /etc/dumpadm.conf

Solaris 10 additional instructions:
8. Change the hostname in /etc/inet/ipnodes



However, all x86 updates. should visit community software (csw package download)
http://www.blastwave.org/packages.php

blastwave.org


This includes wget, pkg-get, tetex etc.

WTS 2007 Paper Publication

Exchange information on advances in mobile communications and wireless networking technology, management, applications, and security in a very pleasant Southern California conference environment with leaders and experts from industry, governmental agencies, and universities around the world at the Wireless Telecommunications Symposium.

WTS 2007 will focus on The Future of Wireless Communications. Planned highlights of WTS 2007 include:

* An IEEE Communications Society Co-Sponsored Welcoming Dinner with Internet Pioneer Vinton G. Cerf, Vice President and Chief Internet Evangelist at Google, as guest speaker
* Addresses and presentations by some of the most respected executives and researchers in the wireless communications industry
* Panel discussions including Future Directions in Wireless Communications Research, Wireless Network Security, New Wireless Communications Ventures, Wireless Communications Investments, Mobile Wireless Services and Business, Wireless Communications Business Strategy, Advances in Satellite Communications, and The Future of Deep Space Communications
* A tutorial on Portable Emergency Networks and a Wireless Network Security Workshop
* Presentations of accepted academic and practitioner applied research papers; a poster paper session; a doctoral students session
* A tour of Universal Studios Hollywood followed by a reception at CityWalk


Peer-reviewed proceedings will be published by the IEEE and will be available on its Xplore online publication system. A CD containing the invited speakers' presentations and accepted applied research papers will be distributed to registrants at the conference. Applicable student papers are welcome. Awards will be given for the outstanding undergraduate and graduate papers submitted.


http://www.csupomona.edu/~wtsi/doc/WTS_2007-Accepted_Paper_Program.htm


My Paper on Lock contention is located by IEEE Explorer

ICACT2007 Paper publication

http://www.icact.org/program/program.asp#3


It is Feb 2007



My Paper stated as Index and SOA Performance


Please visit IEEE Explorer

ISCIT2006

Hash Distribution Algorithm

For a hash-based distribution algorithm, the most difficult part is to define what hash function would avoid re-distribution. To reduce entry re-distribution, it is also possible to configure the proxy with the maximum number of distribution "slots" upfront, say 10 slots, then associate multiple slots with each service instance.

S1,S2,S3 --> SVC1
S4,S5,S6 --> SVC2
S7, S8, S7, S10 --> SVC3

When the amount of entries stored on SVC1 exceed some limits, a new service instance is set up (say SVC4), one (or more) slots formerly managed by SVC1 are moved to SVC4 (the content of SVC1 is re-distributed to SVC1 and SVC4) and the proxy configuration is changed accordingly, for instance

S1,S2 --> SVC1
S3 --> SVC4
S4,S5,S6 --> SVC2
S7, S8, S7, S10 --> SVC3

This does not solve the re-distribution problem. However, it is much easier to deal with this issue as the number of entries to be re-distributed is much smaller compared to a configuration where the max number of slots has not been planned upfront.

sunkeyvalue

Which I think is not an option in that case since the sunkeyvalue attribute is meant to be generic place holder for any key value pair and needs to be mulivalued.

The other thing, the value of this attribute being XML, it contains a special character which forces the value to be base64 encoded in LDIF (and thus in the DB representation of the entry). This increases the size of the value by at least 30%, thus the size of the data to write.

Directory Server 6 made serious improvement over this use case and the replication historical information will be lighter than with 5.2...

DN Binding with Empty Password

Bind with a DN and an empty password is a valid LDAP operation per the
LDAP v3 specifications (RFC 2251) and results in the user being
identified but not authenticated and not authorized...
The result is that the bind is successful but the connection is treated
as an anonymous operation.

Note that this behavior is now discouraged in RFC 4513 and Directory
Server 6 has a configuration parameter to accept or reject these requests.

DS Instance Life cycle

"Disorderly shutdown" message is logged when DS starts and does not find the guardian file that DS writes when it closes the database properly.

Then the server starts and opens the database in recovery mode. If it doesn't start at all, without starting the recovery, it might be a corruption of the config file (dse.ldif). There should be 2 other copies of the dse.ldif in the config directory: dse.ldif.bak (the previous version), dse.ldif.startok (the last one used to start the server). A working dse.ldif can be rebuilt from these files.

If it does go through the recovery mode but fails to recover the database, then you're in trouble. It means that either the DB files are corrupted or the transaction log file is.

One way to quickly recover the server can be to make a backup of another server with the same configuration (other master) and restore it on this server.

Configuring Multiple NIC interfaces in one Zone

In configuring your zone, just "add net" for each device like below (
could certainly access multiple disks this way but there are still uncleared
issues) :

zonecfg -z myzone
create
set zonepath=/zfspool/fs/myzone
set autoboot=true
############### see below ###########
add net
set address=129.148.20.2
set physical=ipge1
end
add net
set address=129.148.30.2
set physical=ipge2
end
################ see above ##############
....
verify
commit

Sun Fire System Auto Reboot

on OBP, use setenv
ok> setenv auto-boot? true

on Solaris use eeprom(1)
% eeprom auto-boot?=true

ZFS Ignore fsflush

ZFS ignores the fsflush. Here's a snippet of the code in zfs_sync():

/*
* SYNC_ATTR is used by fsflush() to force old filesystems like UFS
* to sync metadata, which they would otherwise cache indefinitely.
* Semantically, the only requirement is that the sync be initiated.
* The DMU syncs out txgs frequently, so there's nothing to do.
*/
if (flag & SYNC_ATTR)
return (0);

However, for a user initiated sync(1m) and sync(2) ZFS does force
all outstanding data/transactions synchronously to disk .
This goes beyond the requirement of sync(2) which says IO is inititiated
but not waited on (ie asynchronous).

Mount ISO file on Solaris

- make the ISO image file available as a block device with
lofiadm(1M), e.g.

# lofiadm -a /var/tmp/sol-10-u1-companion-ga.iso
/dev/lofi/1

- mount the block device, e.g.

# mount -r -F hsfs /dev/lofi/1 /mnt

- when you're done, umount the file and delete the device with

# lofiadm -d /dev/lofi/1

JVM tunnables for JVM on x410

Java HotSpot(TM) 32-bit Server VM on Windows, version 1.5.0_06

http://www.spec.org/jbb2005/results/res2006q1/jbb2005-20060117-00061.txt

Java HotSpot(TM) 32-bit Server VM on Solaris, version 1.5.0_08

http://www.spec.org/jbb2005/results/res2006q2/jbb2005-20060512-00112.txt

ZFS on Solaris 11

Find disk and slice

format --> select disk --> partition ---> print


# format
Searching for disks...done


AVAILABLE DISK SELECTIONS:
0. c0t0d0
/pci@0,600000/pci@1/pci@8/pci@0/scsi@1/sd@0,0
1. c0t1d0
/pci@0,600000/pci@1/pci@8/pci@0/scsi@1/sd@1,0
Specify disk (enter its number): 1
selecting c0t1d0
[disk formatted]


FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
inquiry - show vendor, product and revision
volname - set 8-character volume name
! - execute , then return
quit
format> partition


PARTITION MENU:
0 - change `0' partition
1 - change `1' partition
2 - change `2' partition
3 - change `3' partition
4 - change `4' partition
5 - change `5' partition
6 - change `6' partition
7 - change `7' partition
select - select a predefined table
modify - modify a predefined partition table
name - name the current table
print - display the current table
label - write partition map and label to the disk
! - execute , then return
quit

partition> print
Current partition table (original):
Total disk cylinders available: 14087 + 2 (reserved cylinders)

Part Tag Flag Cylinders Size Blocks
0 root wm 2 - 1135 5.50GB (1134/0/0) 11539584
1 swap wu 1155 - 2309 5.60GB (1155/0/0) 11753280
2 backup wm 0 - 14086 68.35GB (14087/0/0) 143349312
3 unassigned wm 2310 - 3464 5.60GB (1155/0/0) 11753280
4 unassigned wm 3465 - 4619 5.60GB (1155/0/0) 11753280
5 unassigned wm 4620 - 5774 5.60GB (1155/0/0) 11753280
6 unassigned wm 5775 - 12931 34.73GB (7157/0/0) 72829632
7 home wm 12932 - 14086 5.60GB (1155/0/0) 11753280

(2) use c0t1d0s6 for zfs

(3) create v device pool

# zpool create ktspool c0t1d0s6

(4) list the pool
# zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
ktspool 34,5G 33,5K 34,5G 0% ONLINE -
(5) check pool status
# zpool status
pool: ktspool
state: ONLINE
scrub: none requested
(6) ktspool file system was created. verify file system

# df -kh
Filesystem size used avail capacity Mounted on
/dev/dsk/c0t0d0s0 9,8G 3,6G 6,2G 37% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 14G 1,1M 14G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
fd 0K 0K 0K 0% /dev/fd
swap 14G 8K 14G 1% /tmp
swap 14G 48K 14G 1% /var/run
/dev/dsk/c0t0d0s7 50G 56M 49G 1% /export/home
ktspool 34G 9K 34G 1% /ktspool

(7) create a new file system as ktspool/kts

zfs create ktspool/kts

(8) verify the file system creation

# df -kh
Filesystem size used avail capacity Mounted on
/dev/dsk/c0t0d0s0 9,8G 3,6G 6,2G 37% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 14G 1,1M 14G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
fd 0K 0K 0K 0% /dev/fd
swap 14G 8K 14G 1% /tmp
swap 14G 48K 14G 1% /var/run
/dev/dsk/c0t0d0s7 50G 56M 49G 1% /export/home
ktspool 34G 9K 34G 1% /ktspool
ktspool/kts 34G 9K 34G 1% /ktspool/kts

(9) change the mount point of the zfs file system to /kabirazfs

zfs set mountpoint=/kabirazfs ktspool/kts

(10) verify the new mounted point

# df -kh
Filesystem size used avail capacity Mounted on
/dev/dsk/c0t0d0s0 9,8G 3,6G 6,2G 37% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 14G 1,1M 14G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
fd 0K 0K 0K 0% /dev/fd
swap 14G 8K 14G 1% /tmp
swap 14G 48K 14G 1% /var/run
/dev/dsk/c0t0d0s7 50G 56M 49G 1% /export/home
ktspool 34G 9K 34G 1% /ktspool
ktspool/kts 34G 9K 34G 1% /kabirazfs


Also can see /kabirazfs is created under "/"


(11) zpool iostat -x 5


(12) check zfs properties setting. such as compression is disabled

# zfs get all ktspool/kts
NAME PROPERTY VALUE SOURCE
ktspool/kts type filesystem -
ktspool/kts creation lun oct 9 19:08 2006 -
ktspool/kts used 9,50K -
ktspool/kts available 34,2G -
ktspool/kts referenced 9,50K -
ktspool/kts compressratio 1.00x -
ktspool/kts mounted yes -
ktspool/kts quota none default
ktspool/kts reservation none default
ktspool/kts recordsize 128K default
ktspool/kts mountpoint /kabirazfs local
ktspool/kts sharenfs off default
ktspool/kts checksum on default
ktspool/kts compression off default
ktspool/kts atime on default
ktspool/kts devices on default
ktspool/kts exec on default
ktspool/kts setuid on default
ktspool/kts readonly off default
ktspool/kts zoned off default
ktspool/kts snapdir hidden default
ktspool/kts aclmode groupmask default
ktspool/kts aclinherit secure default

OpComm2006

Classic Relational Algebra Algorithm

The algebra on sets of tuples or relations could be used to express typical queries about those relations (1) Union (2) set difference (3) Cartesian Product (4) selection
(5) projection (6) aggregation (7) renaming


set operation(union, intersection, difference), selection, projection, Cartesian product, natural join, theta-join, renaming, duplicated elimination, aggregation, grouping, sorting, extended projection,outerjoin (naturla, left, right)


Intersection, theta join, natural join are dependent operations.
Union, differences, production, selection, projection, renaming are independent operations

R&D Conference Presentation in China

Software R&D is boomed in China. People respect R&D there.

NFS Service in NGZ

One cannot do NFS in NGZ but Solution to get NFS Service in NGZ

One can make the GZ an NFS sever and just use loopback from GZ to NGZ instead, this can simulate NFS. Since this is a loopback it should be faster and more efficient than using NFS. Just something to ponder? It might work. Now if your requirement is to put the NFS server in a NGZ, you cannot do that today. Maybe it will be addressed in an update depending on demand?