The Ways in “Caching” for Speeding Up Web Server – Part 2

You may read the previous posting (Part 1):

- The Ways in “Caching” for Speeding Up Web Server – Part 1

Figure 01- Caching through HTTP (source: BetterExplained, 2007)

In addition, the meta tag (refresh) is also used to redirect the customers from one Web page to another.

The second method for “caching” is “Programmatically setting HTTP headers (CGI scripts etc.).”

This second method is useful for CGI (Common Gateway Interface) scripts that output dynamic data.

How catching through HTTP could improve web server performance could be seen at Figure 01 above.

Fig 02- Carolina basswood, baby trees

Fig 03- American hornbeam, baby trees

Fig 04- Poinsettias, indoor flowers

From above Figure (please the Figure 01 again), we will understand the sequences that:

- browser request to get index.html

- then web server searching

- the respond from server is providing file request

- the last step that browser display the files.

The last method is “through web server configuration files or httpd.conf.”

Then, what are the advantages of file configuration?

# To be continued to Part 3

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Do you Favor to Certain Chicken Egg Colors? - Part 2

You may read the previous posting (Part 1):

- Do you Favor to Certain Chicken Egg Colors? - Part 1

what is the most common egg color?

Fig 01- Eggs produced by a nearby family farming

The answer is White, especially in the big grocery such as Walmart

We might observe some other colors such as:

- brown

- green

- blue- green

- cream

- pink

- blue

- chocolate brown

Fig 02- Chicken as a pet

Fig 03- Eggs are ready to be consumed.

In addition to genetic, eggs colors are added by pigment called as “Porphyrins.” This pigment is produced from uterus of hen.

Hence, colors of eggs don’t cause the different of the taste and nutritional values of eggs.

In case, we might find the slightly different in taste and egg’s nutritional values, it could be caused by other several factors such as hen’s diet and the ways to raise the hens.

Do you favor to certain egg colors?

Why?

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Hawks to Control Rats at Neighborhood - Critters 1

Hawks are seen frequently in our neighborhood, they fly low and between houses, not over the houses.

The sharped shinned hawks are common hawks in our state, Louisiana. However, we saw they visit bird feeders at backyard at certain period.

Fig 01- A hawk on fence at our neighborhood

In addition to the sharped shinned, Louisiana has other type of hawks, they include:

- cooper hawk

- red tailed hawk

- red shoulder hawk

- broad wing hawk

- Swainson's hawk

- Osprey

Fig 02- Bird feathers on the road

It seems the predators are quite adapted to our city or neighborhood life. They may find natural food easily.

Fig 03- A hawk backyard

Our friends believe that the hawks are coming to control rats at the neighborhoods.

Fig 04- A hawk at our neighborhood.

Unfortunately, these predators also attacking, preying and hurting some other small animals such as:

- songbirds that come to visit our bird feeders at backyard.

- baby squirrels

- small pets (cats and dogs)

- chickens

- rabbits

- frogs

Actually, hawks consume everything, even snakes, insects and lizards. 

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Zinnia Flower and Vincent Van Gogh – Part 2 - Art 3

You may read previous posting (Part 2):

- Zinnia Flower and Vincent Van Gogh – Part 1 - Art 3

Fig 01- Vase with Zinnia, painted by Van Gogh (1886)

What interesting for me is that Zinnia flower depicted by Van Gogh. In nature, Zinnia has 13 different species.

Several popular Zinnias to grow are:

- Purple Prince

- Queen Red Lime

- Aztec Sunset

- Red Spider

- Early Wonder

- Queen Lime

Fig 02- Sky after raining, just for illustration

Zinnia flowers are native to American continent, spreading from USA to some part of Latin America.

Fig 03- Zinnia, painted by Van Gogh.

The flowers are easily found in the countries or areas such as:

- Southwestern United States

- Mexico

- and Central America

Fig 04- Poppy flowers, painted by Van Gogh

This flower of Zinnia is quite popular around the globe now days, and to be gardens flowers.

Since Zinnia riches in nectar, the flowers attract many pollinators:

- butterflies

- hummingbirds

- ladybugs

- Japanese Beetles

- wasps

It might be the reason, Zinnia flowers to be a must plant in the gardens in many countries.

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Pets must Remain on a Leash at All Time – Sign 1

We saw unusual crowd when we visit one of our city lake last week. We guessed it might relate to lower infection rate of corona virus.

People feel “less restriction” with comfortable temperature like “spring” season of 17 C (63 F) degree.

Fig 01- A sign at the park of lake side

There is a park rules sign at lake side with 9 little signs in its, what interesting sign is that pets must remain on a leash at all times and pets waste removed.

Other little signs are:

- all neighborhood parks close at dark

- use profane language and loud music is prohibited

- alcohol, drugs, fire arms, explosives and weapons are prohibited

- glasses are prohibited. Placing all trash and litter in receptacles.

- driving off park roads are prohibited

- golf practice allowed only at designed golf facilities

- picnic pavilions are first come first serve

- thank you for not smoking

Fig 02- A beagle was roaming around neighborhood.

There are many migrant birds on the lake. One of them is pelican as one of bigger birds in America.

Fig 03- White pelicans, swimming around the lake

Thess yellow beak birds come from northern part of America include:

- Alberta and Northwest Territories provinces

- Rocky Mountain’s ponds and lakes

Fig 04- A German Shepard at neighborhood

We know that the main reason the birds migrate to southern states of USA is freezing in high elevation waters of northern American.

Our city lakes provide fish as food source to draw the pelican to come. The lakes to be a kind of eating zone.

In addition to our city lake, the pelicans love to visit:

- quiet waters of the Atchafalaya Basin

- coastal lakes.

- rice fields

How many lakes or ponds your city or place have? What kind of migratory birds visit those lakes?

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The Ways in “Caching” for Speeding Up Web Server – Part 1

In database systems, the word “caching” means store something temporarily, then retrieved again for near future use.

As suggested by Price (2011: Web Performance Optimization, Part 1: Web Server Caching) that there are several goals of caching.

Fig 01- Painting by David Hockney, illustration only

The purposes of caching are following:

- Increasing the speed of content delivery.

- Reducing the amount of redundant work

- and putting a file in memory to re-use to save millions of drive accesses.

At the end, caching is supposed to improve server performance.

Moreover, three Ways for “Caching” to speed up Web server performance that are:

1. Via (meta) tags (<meta http-equiv="Expires"...>)

2. Programmatically setting HTTP headers (CGI scripts etc.)

3. Through web server configuration files (httpd.conf)

Fig 02- Public safety, illustration only

Fig 03- Flowers at the garden

First, Kyrnin (2015: Force Your Page to Always Load from the Server Not the Web Cach) mentioned that a meta tag could control browser “caching,” then Web server could be speeding up.

Search engine optimization (SEO) often apply meta tag. The simple reason is to attract people to click our sites. Thus it will affect on traffic and your site ranking.

# To be continued to Part 2

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Zinnia Flower and Vincent Van Gogh – Part 1 - Art 3

The sunflower is one of well known flowers painted by a Dutch painter, Vincent Van Gogh.

The cost almost reached US$ 40 million in 1987 auction. It is estimated for about US$ 98 million today.

Fig 01- Zinnia elegans with butterfly

There are two series of Van Gogh’s sunflowers (Tournesols in French) :

- Paris series, 1887

- Arles series, 1888

Paris series was characterized by sunflower lying, while the Arles series was painting of sunflowers in the vase.

There are five well known paintings of sunflowers in the vase which are belong to museums around the globe now days.

Actually, the painter has other flowers as painting objects as reported by Teresa Bernard, 2015: The Flower Paintings of Vincent van Gogh).

Fig 02- Zinia flowers, painted by Van Gogh

Fig 03- Irises flowers, painted by Van Gogh

Fig 04- Sunflowers, painted by Van Gogh

The flowers include:

- irises

- roses

- poppies

- corn flowers

- myosotys

- chrysanthemums and almond blossom

- red poppies and daisies

- pink roses

# Continue to Part 2

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