Trending December 2023 # Sun Lights Up New Cluster Software # Suggested January 2024 # Top 16 Popular

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Sun Microsystems Tuesday said began shipping CDs of the latest version of its Clustering Software as a prelude to the launch of the company’s biggest projects this year.

The Santa Clara, Calif.-based network computer maker said it has reached the crucial version 3.1 of its software framework. A key component of the company’s SunPlex environment, Sun Group Marketing Manager Jim Sangster says the new software is designed to deliver high-availability application services to the data center or enterprise.

“Our previous versions before Sun Cluster 3.0 were based on it being a software addition. What we have now is a solution integrated in the kernel itself,” Sangster told chúng tôi “We’ve had various clustering items for quite sometime now. Previously, we have had a focus in the availability and the High Performance Technical Computing aspects of clustering such as our Grid software. This version is specifically designed for commercial-grade platforms like Oracle 9i or IBM DB2. With 3.1, we’re moving specifically down the path of high performance.”

Most notable is the addition of five new agents – HA IBM WebSphere MQ; HA IBM WebSphere MQ Integrator; HA SAMBA; HA DHCP; and third-party agent IBM DB2-HA. All of these agents support security hardening.

The software versioning framework also taps into the Solaris 9 Resource Manager (S9RM) platform for consolidation, resource control, IO assigned to users or groups of users, and to control off-site nodes and lets customers upgrade from Sun Cluster 3.1 to later releases without having to shut down the entire ring.

The Cluster Software is the latest piece of Sun’s arsenal that it is getting a makeover as the company migrates to a quarterly software release model. But more significant for Sun is the place it holds in the major product releases due out this year: N1 and Orion.

“Provisioning is certainly a large part of version 3.1,” Sangster said. “You’re going to see more HA [high availability] aspects coming from Sun in the future. You’ll see it the form of the databases that have started with it. You also see it in the newer application servers and some of the more traditional app servers.”

The Cluster Software’s pricing, while novel has also been tweaked for Sun’s billing framework: Project Orion.

Instead of metering or bundling, the software takes very traditional approach of charging per physical server box ranging from $1,000 for one to as much as $100,000. Multiple domains are not counted. In most cases, Sangster expects licensees to commonly use it on big box servers with multiple processors.

That way, he says, the software can be provisioned to one server, big banks of blades or to a cluster without worrying about tracking down how much time was spent on each node.

Sangster said the improvements in Sun Cluster Software version 3.1 is also one of the first steps toward migrating a system to Sun’s upcoming Solaris 10 release, which is due in the fourth quarter of next year. The first versions of the release are expected to let you build a volume to a petabyte and using partitioning run a file system on each of those volumes up

A handful of customers already have had the beta update in their hands and now that testing is finished are announcing support this month, such as French-owned video-on-demand firm Canal + and Japanese-owned CTC. Sangster said a major yet-to-be-named partner is also preparing a nod towards the new cluster software.

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Checking The Cluster Health In Cassandra

Introduction

Apache Cassandra is a highly-scalable, high-performance distributed database that is designed to handle large amounts of data across many commodity servers. As a result, it’s important to keep an eye on the health of your Cassandra cluster to ensure that it’s running smoothly and that there aren’t any issues that could impact performance or availability. In this article, we’ll go over the different ways to check the health of your Cassandra cluster and what to look for to identify potential issues.

Understanding Cassandra Cluster Health

Before diving into how to check the health of your Cassandra cluster, it’s important to understand what exactly we mean by “cluster health.” A healthy Cassandra cluster should have all nodes up and running, with no dropped or stale nodes. Additionally, there should be a relatively even distribution of data across all nodes, and there should be no issues with replication or compaction.

Using nodetool to check cluster health

One of the most common ways to check the health of a Cassandra cluster is by using the nodetool command-line tool. This tool is included with Cassandra and provides a variety of information about the cluster and its nodes. One of the most useful commands for checking cluster health is nodetool status. This command will show the status of all nodes in the cluster, including whether they are up or down, and how much data they are currently storing.

$ nodetool

status

Datacenter: datacenter1

Status

Down UN

10.0

1.21

256

67.6

456789

abcdef01234567890abcdef0123 rack1 DN

10.0

1.21

256

67.6

456789

abcdef01234567890abcdef0123 rack1

The status command will show the status of all nodes in the cluster, including whether they are Up or Down. In the example above, the first node is Up and the second node is Down. Additionally, the command will show the load and tokens for each node, as well as the percentage of data that the node owns.

Another useful command provided by nodetool is nodetool ring. This command will show the token distribution for the cluster and can help identify if there is an uneven distribution of data among the nodes.

$ nodetool ring Datacenter: datacenter1

Address Rack

Status

State

Load

Owns Token

10.0

rack1 Up Normal

1.21

67.6

9223372036854775808

10.0

rack1 Up Normal

1.21

67.6

3074457345618258603

10.0

rack1 Up Normal

1.21

67.6

3074457345618258602

Monitoring Replication and Compaction

In addition to monitoring the overall health of the cluster and individual nodes, it’s also important to keep an eye on replication and compaction. Replication is important to ensure that data is being properly replicated across all nodes in the cluster, while compaction is important to keep the data on each node organized and efficient.

To monitor replication, you can use the nodetool command nodetool statusgossip which will show the current state of gossip and the replication factor for each keyspace.

$ nodetool statusgossip Gossip active :

true

Thrift active :

false

Native Transport active:

true

Load

1.21

GB Generation

1596282421

Uptime :

s Heap Memory

(

)

606.36

3441.00

Off

Heap Memory

(

)

1.51

Data

Center : dc1 Rack : r1 Exceptions :

Key

Cache : entries

size

4.11

capacity

100

hit rate

0.000

recent hit rate

0.000

save

period

seconds

3600

Row

Cache : entries

size

bytes

capacity

bytes

hit rate NaN

save

period

seconds

The statusgossip command will show the current state of gossip, the load on the cluster, and the generation number. It will also show the uptime, heap memory, and off-heap memory for each node. Additionally, it will show the data center and rack for each node, as well as any exceptions that have occurred.

To monitor compaction, you can use the nodetool command nodetool compactionstats. This command will show the current compaction status for each table in the cluster, including the number of completed and active compactions, as well as the total bytes compacted.

$ nodetool compactionstats pending tasks:

compaction

type

: Major compaction history:

Note − In this example there is no compaction history.

The compactionstats command will show the number of pending tasks, the compaction type (major or minor), and the compaction history for each table.

Real-life examples

A real-life example of monitoring cluster health in Cassandra would be a scenario where you are running a Cassandra cluster that is being used to store user data for a web application. In this case, you would want to regularly check the health of the cluster to ensure that all nodes are up and running, and that there is an even distribution of data across the nodes. Additionally, you would want to check the replication and compaction status to ensure that data is being properly replicated and compacted.

Another example would be for an e-commerce website where the Cassandra cluster is used to store product and order information. In this case, it would be important to monitor the load on each node, as well as the number of completed and active compactions, to ensure that the cluster can handle the high volume of read and write requests from the website.

Conclusion

Monitoring the health of your Cassandra cluster is an important aspect of maintaining a high-performing and available database. By understanding the key metrics to look for and using the tools provided by Cassandra, like nodetool, you can keep a close eye on the overall health of your cluster and identify potential issues before they become a problem. With proper monitoring, you can ensure that your Cassandra cluster is running at its best and your data is always available to your application.

Sun Updates Open Source Roadmap

SANTA CLARA, Calif. – Some of the top promoters and leaders of open source projects gathered at Sun Microsystems Monday to update press and analysts on the company’s growing list of projects and initiatives.

Long criticized as a company that benefited from many open source projects without giving back in kind, and hounded to make its Java language open source, Sun has abruptly shifted course in the last year under new CEO Jonathan Schwartz.

Now its Solaris operating system, Java language and even SPARC processors are open source and under the General Public License (GPL). Quite a change for the company that said there’s still a lot more it plans to do.

One of its To Do list items is to make Solaris easier to distribute. Linux has had packages for distributing bits of compiled code for years, first under the RPM technology developer by Red Hat Linux and then via Yum or App-Get.

Ian Murdock, who created the Debian Linux distribution back in the 1990s, was hired by Sun earlier this year to help with such an effort. He also told the assembly that his hiring was meant to send the message that Sun is Linux-friendly.

“There’s a broad perception that Sun is anti-Linux or competes with Linux, and that’s not true,” said Murdock, now chief operating systems platform strategist. “So to have someone with a broad Linux background come into Sun made sense.”

His project, called Project Indiana (a nod to his home state) will be an attempt to give OpenSolaris, and eventually the enterprise version of Solaris, a faster, easier and safer way to update the code. It’s also intended to lower the barriers to adoption so those familiar with Linux can move to OpenSolaris, said Murdock.

Murdock pointed out that Yum and App-Get are several years old now and have some shortcomings. Namely, they don’t allow you to rollback an installation if there is a problem. Sun’s solution is IPS, or Image Package System.

IPS will do exactly as RPM, Yum and App-Get do in that it will download updates to the operating system, thereby eliminating the need for updates via CD or having to download source code and compile it. It will update a Solaris installation with any new code, check for dependencies and download that code as well, and install it all for the user. It’s integrated with Sun’s ZFS file system to take snapshots of an installation and roll it back if necessary.

Next to speak was Josh Berkus, the project lead for PostgreSQL, an open source database that’s trying to catch up not only to the more established MySQL but commercial packages like SQL Server and Oracle as well. It’s updated annually, with beta 1 of version 8.3 released last week and the final version due in seven to nine weeks.

PostgreSQL can trace its roots back 21 years, to the POSTGRES project at the University of California, Berkeley. It was created as the successor to the Ingres database and commercialized in 1994 under the name Illustra, which later merged with Informix. It went open source in 1995.

Berkus said surveys found it wasn’t performance holding back PostgreSQL from taking more of the database market from packaged software firms, rather it was training and knowledge. There was a serious lack of support for the product, of tools to support it and knowledge out there for those interested in using it, he said.

Berkus identified the missing pieces as a lack of worldwide support, performance that was fast but not consistent and a lack of enterprise-quality scalability and reliability. So Sun’s efforts in that area have been to focus on high availability and improved performance, as well as ZFS integration.

The third briefing came from Mark Reinhold, chief engineer for the Java SE platform and a lead engineer for OpenJDK, the open source Java Development Kit being used to port Java to numerous platforms.

He said the interim governance board for the OpenJDK community has met three times so far and is making good progress. They would like to get a constitution for the OpenJDK community out for review later this year and ratified some time next year.

One of the problems slowing down the complete availability of Java as open source is that some pieces of code are not owned by Sun and could not be released. Therefore, Sun and the community had to develop its own replacements, and those are not trivial tasks. Reinhold said Sun currently has early versions of the font rasterizer done, a cryptography component and the graphics rasterizer, which is in a pretty raw state.

New Theatre Production Center Is Up And Running

New Theatre Production Center Is Up and Running Scenery, prop, and costume shops are hives of collaboration

Peek inside the new state-of-the-art Boston University Production Center. Photos by Cydney Scott

For years, BU theater design and production students and faculty made do with facilities at the BU Theatre, where they shared studios with the Huntington Theatre Company’s professional artists. The College of Fine Arts School of Theatre students were easy to spot on the BU Shuttle, hauling their painting tools and oversized portfolios for the two-and-a-half-mile ride to and from the Charles River Campus.

Those days ended at the start of fall semester, with the opening of the new state-of-the-art Boston University Production Center, just across Comm Ave from CFA. The center stands alongside the Joan and Edgar Booth Theatre, whose doors will open in time for the spring semester.

The 75,000-square-foot theater complex, designed by Elkus Manfredi Architects, comprises the 250-seat theater, production and costume shops, design labs, classrooms, faculty offices, and a landscaped plaza. The project was funded in part by the University’s 2023 sale of the BU Theatre, the longtime home of the Huntington Theatre Company.

“In the new building, you have pride of place. Students feel a sense that this place ennobles their work,” says Jim Petosa, director of the School of Theatre, a member of the faculty team that collaborated with the architects on the design. Previously, design and production students didn’t see much of their performance classmates, who work out of the CFA building. Now, Petosa says, “the proximity that they have to each other is stimulating collaborative energies. That’s a direct result of the new building.”

While the outside of the complex and the interior of the theater are still very much construction zones, the Production Center’s scenery, prop, and costume shops are brimming with activity. Students in Diane Fargo’s scenic painting class are working with large canvases in sun-drenched studios, designing a 25-by-50 foot ground cloth that will be a backdrop in an upcoming production. If they choose, they can raise the backdrop in the shop to see it as it would appear on a stage.

“Not having to share the space is huge for us,” says Fargo, a CFA senior lecturer in scenic design. “Students get so much more out of the experience because they can spend the time and spread out as opposed to constantly moving around. They are going to walk out of here with serious experience.”

Facility production manager Johnny Kontogiannis (CFA’02) says the faculty team began thinking about the building process the same way an artist approaches a blank canvas. “We asked, ‘What makes a fully comprehensive production facility?’” he says. “We collaborated to develop a space that was useful and reflected on some of the problems we had in the old building.” For instance, lighting and sound designers had previously worked in separate rooms, but collaboration is now possible with the new sound and light lab, which Petosa describes as a place where theater-makers can create conditions to test the interaction of lighting and sound before bringing them to the stage.

Architect Ross Cameron, an Elkus Manfredi senior associate, says it’s unusual to have such a large scene shop in an urban area like Boston. “In the scene shop, we very purposely included windows and openings in a building typology that is usually just a big metal box,” says Cameron. “If someone’s walking down Dummer Street, they can look in and watch someone painting a scene. None of the building design was whimsical. It’s all driven by giving CFA maximum flexibility in the space.” For instance, a partition wall divides the large room so multiple groups can use it, but it can be pulled back.

He compares the production wing’s layout to a “theatrical assembly line.” First up is the loading dock, where raw materials are brought in. Next comes the fixed tool area, where materials are cut and shaped before the assembled pieces are brought to the paint shop. Sets and backdrops can either take a left into the Joan and Edgar Booth Theatre or be loaded back onto the truck to head to another facility.

“The only limitation is that pieces have to be able to fit in a truck,” says Walt Meissner (CFA’81), BU associate vice president for operations, who is overseeing the project for the University. “So the truck is what’s limiting the size, not the building.”

Faculty team members say they are particularly indebted to Steven Friedlander (CFA’80), president of performing arts planning and design firm Auerbach Pollock Friedlander, who has been the project’s official theater consultant. “His guidance and knowledge helped provide clear communication and a professional knowledge that bridged our faculty teaching-artists and the architecture team,” Petosa says. “Together, they created a state-of-the-art facility that is flexible and flawlessly designed for maximum use and efficiency and offers our students an exemplary place to work and learn.”

Jon Savage, a CFA assistant professor of scene design and head of undergraduate design and production, says everyone is pleased that the University invested in such a facility. “We’re really grateful for the University’s recognition of, and contribution towards, the needs of these students,” he says. “We feel it is a continued investment in us.”

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Google And Sun Microsystems: The Costly Non

Google has passed up a few potential buys that, as has been proven by history, it absolutely should not have passed up. Facebook, for example? And while Google has had some great success in certain purchases, such as AdMob and Android, it seems that “buy more” should be the rule of thumb for the company. One choice that may have cost them billions is not buying Sun Microsystems.

Sun would have cost Google big bucks. That’s $7.4 billion to be precise. But that cost would have given Google rights to a very important set of technology: Java. The coding language, especially in its more open sectors, is used extensively by Google – and having rights would have increased maneuverability while, you know, preventing the massive lawsuit from Sun’s current owner.

Oracle, who bought out Sun Microsystems when Google didn’t, is in the process of suing Google. While the case has been ongoing for just under a year, the exact scale became apparent when Google attempted to file the case “under seal” (preventing the records of the case and hearings from becoming public). Oracle responded by saying the information was something the public should know, especially since the figures Oracle was seeking in damages reached into the billions.

No, that wasn’t a typo. That’s a big, shiny B at the front there. So, while Sun Microsystems would have cost Google billions, it looks like not making the choice may end up costing about the same. The difference is that Google now has to struggle through future licensing issues, the court case itself, and they still don’t have the full strength of the technology at their disposal.

It may be that Google didn’t make the purchase because a $7.4 billion buy simply wouldn’t have been allowed after the inevitable anti-trust hearing. In any case, however, it looks like not owning Sun Microsystems costs just about as much as buying it.

[sources include: ZDNet]

Daybetter Smart Led Strip Lights Review: Ambient Light On A Budget

Creating ambient light in any room of your home doesn’t require an expensive electrician. Instead, do it yourself with Daybetter Smart LED Strip Lights. Control them remotely to set the mood for reading, relaxing, dancing, or anything else. I recently had the opportunity to try these lights out for myself to create custom light scenes for any occasion.

Overview of Features

The Daybetter Smart LED Strip Lights are long-lasting lights that are easy to install nearly anywhere. As long as you’re within 25 feet of an outlet, you’re good to go. Since they’re made to last at least 50,000 hours, you won’t need to install new lights for a while. For perspective, that’s over 2,000 days or over 5.5 years if you have them on constantly.

The set includes two 25 foot rolls of lights with 270 individual lights total. Easily control them one of four ways: IR remote, Tuya Smart app, or the control box. They’re also compatible with Amazon Alexa and Google Assistant for voice control. You’re able to control the brightness, color, and turn them on and off with your voice.

Thanks to the app, you can create unique scenes using any of the 16 million colors. Try out built-in Scene modes or create your own. Set timers and schedules for automatic control based on your day and needs.

There’s even an option to sync your lights to music. The built-in mic picks up your music to create fun party lighting instantly.

In the Box

The Daybetter Smart LED Strip Lights include everything you need to get started right out of the box. A remote, the control box, a power adapter, and of course, the lights are all included. The included instruction manual is surprisingly clear to help you get set up quickly.

A slow, gentle transition between the main colors greets you from the moment you connect and plug in the lights. Use the 24-button remote or the Tuya Smart app to change the mode, adjust the brightness, turn them on/off, and more.

The control box includes the IR receiver to work with the remote. You must be within sight of it and within approximately 26 feet. I found it works better if you’re much closer. There are also two connection points to connect two rolls of lights.

While you can cut and connect the strips at predesignated points, it’s easier to just use the second connection point on the control box if you’re only using two strips.

An adhesive strip is on the strip itself. Even on the cleanest, driest surfaces, areas of the adhesive don’t seem to completely stick (only a few inches out of 50 feet for me).

If you have any small adhesive clips on hand, these work well for keeping the lights in place if you have issues. Use clear clips to avoid blocking any of your lights.

Getting Set Up

I started my test by using just the remote. Honestly, if you just want basic control, the remote is all you need. Make sure you don’t hide the receiver on the control box or the remote won’t work well.

There are 15 colors to choose from on the remote, but there are millions to select in the Tuya Smart app. I didn’t see much difference in the Strobe and Flash modes on the remote. In fact, both were rather slow and felt more like the Fade mode. However, the lights are nice and bright, but you can dim them to create a much softer atmosphere.

With the Tuya Smart app, make sure your phone or tablet is on a 2.4 GHz network or you can’t connect. If you have a dual-band router that doesn’t let you manually select, move as far from your router as you can to get it to switch to the 2.4 GHz network. Once you’ve set up the lights in the app, it works fine no matter where you are in your home.

The app guides you through the setup process. The only hard part was getting the lights into the rapid flash mode. I didn’t have any luck using the remote to turn them on and off as required. (The remote does turn them on and off but didn’t trigger the rapid flash mode required for the connection process.) I had to manually plug and unplug the lights from the outlet several times, waiting two seconds between each round.

After that, everything worked great. The app couldn’t be easier to use. It has a clean interface. Simply tap to choose your color. Set scenes, start syncing to music, create schedules, and more.

Cut the strips to fit your desired area by cutting on the predesignated cut points. These are clearly labeled. Cutting anywhere else could destroy the lights.

Lights in Action

The Daybetter Smart LED Strip Lights performed great overall. Any adjustments I made happened almost instantly. The vivid colors brightened the room with ease.

With Scenes, I was able to speed up the flashing, which creates more of a strobe effect. The Music mode worked better than expected. Instead of just rapidly flashing with every beat, it worked more off the vocals and lead instruments to create more unique patterns. There were some times when it didn’t seem to quite sync, though.

While the lights do get warm, they don’t get hot. I’m not sure how that warmth could mess with the adhesive over time, but it didn’t seem to affect it during my week-long test.

Final Thoughts

The Daybetter Smart LED Strip Lights are an extremely affordable way to add color-changing lights to any room. They’re for indoor use only since they’re not waterproof, but that’s listed clearly on the box.

They’re easy to control and set up. With millions of colors, you’ll always find the perfect light for the occasion. Both the app and remote work great to quickly control the lights.

My only complaints are relatively minor. I would love the see the Strobe and Flash modes be faster and the music sync to work more consistently. A bigger issue is with the adhesive, which doesn’t seem strong enough to last long term, especially since a few parts didn’t stick at all for me.

The price on Amazon alone is hard to beat at $35.99. However, it gets even better when you buy the Daybetter Smart LED Strip Lights using the discount code H5XKZABP on Amazon to get them for just $15.19.

Crystal Crowder

Crystal Crowder has spent over 15 years working in the tech industry, first as an IT technician and then as a writer. She works to help teach others how to get the most from their devices, systems, and apps. She stays on top of the latest trends and is always finding solutions to common tech problems.

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